| /* |
| * DCA compatible decoder |
| * Copyright (C) 2004 Gildas Bazin |
| * Copyright (C) 2004 Benjamin Zores |
| * Copyright (C) 2006 Benjamin Larsson |
| * Copyright (C) 2007 Konstantin Shishkov |
| * |
| * This file is part of FFmpeg. |
| * |
| * FFmpeg is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU Lesser General Public |
| * License as published by the Free Software Foundation; either |
| * version 2.1 of the License, or (at your option) any later version. |
| * |
| * FFmpeg is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| * Lesser General Public License for more details. |
| * |
| * You should have received a copy of the GNU Lesser General Public |
| * License along with FFmpeg; if not, write to the Free Software |
| * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
| */ |
| |
| #include <math.h> |
| #include <stddef.h> |
| #include <stdio.h> |
| |
| #include "libavutil/channel_layout.h" |
| #include "libavutil/common.h" |
| #include "libavutil/float_dsp.h" |
| #include "libavutil/internal.h" |
| #include "libavutil/intreadwrite.h" |
| #include "libavutil/mathematics.h" |
| #include "libavutil/opt.h" |
| #include "libavutil/samplefmt.h" |
| #include "avcodec.h" |
| #include "fft.h" |
| #include "get_bits.h" |
| #include "dcadata.h" |
| #include "dcahuff.h" |
| #include "dca.h" |
| #include "mathops.h" |
| #include "synth_filter.h" |
| #include "dcadsp.h" |
| #include "fmtconvert.h" |
| #include "internal.h" |
| |
| #if ARCH_ARM |
| # include "arm/dca.h" |
| #endif |
| |
| //#define TRACE |
| |
| #define DCA_PRIM_CHANNELS_MAX (7) |
| #define DCA_ABITS_MAX (32) /* Should be 28 */ |
| #define DCA_SUBSUBFRAMES_MAX (4) |
| #define DCA_SUBFRAMES_MAX (16) |
| #define DCA_BLOCKS_MAX (16) |
| #define DCA_LFE_MAX (3) |
| #define DCA_CHSETS_MAX (4) |
| #define DCA_CHSET_CHANS_MAX (8) |
| |
| enum DCAMode { |
| DCA_MONO = 0, |
| DCA_CHANNEL, |
| DCA_STEREO, |
| DCA_STEREO_SUMDIFF, |
| DCA_STEREO_TOTAL, |
| DCA_3F, |
| DCA_2F1R, |
| DCA_3F1R, |
| DCA_2F2R, |
| DCA_3F2R, |
| DCA_4F2R |
| }; |
| |
| /* these are unconfirmed but should be mostly correct */ |
| enum DCAExSSSpeakerMask { |
| DCA_EXSS_FRONT_CENTER = 0x0001, |
| DCA_EXSS_FRONT_LEFT_RIGHT = 0x0002, |
| DCA_EXSS_SIDE_REAR_LEFT_RIGHT = 0x0004, |
| DCA_EXSS_LFE = 0x0008, |
| DCA_EXSS_REAR_CENTER = 0x0010, |
| DCA_EXSS_FRONT_HIGH_LEFT_RIGHT = 0x0020, |
| DCA_EXSS_REAR_LEFT_RIGHT = 0x0040, |
| DCA_EXSS_FRONT_HIGH_CENTER = 0x0080, |
| DCA_EXSS_OVERHEAD = 0x0100, |
| DCA_EXSS_CENTER_LEFT_RIGHT = 0x0200, |
| DCA_EXSS_WIDE_LEFT_RIGHT = 0x0400, |
| DCA_EXSS_SIDE_LEFT_RIGHT = 0x0800, |
| DCA_EXSS_LFE2 = 0x1000, |
| DCA_EXSS_SIDE_HIGH_LEFT_RIGHT = 0x2000, |
| DCA_EXSS_REAR_HIGH_CENTER = 0x4000, |
| DCA_EXSS_REAR_HIGH_LEFT_RIGHT = 0x8000, |
| }; |
| |
| enum DCAXxchSpeakerMask { |
| DCA_XXCH_FRONT_CENTER = 0x0000001, |
| DCA_XXCH_FRONT_LEFT = 0x0000002, |
| DCA_XXCH_FRONT_RIGHT = 0x0000004, |
| DCA_XXCH_SIDE_REAR_LEFT = 0x0000008, |
| DCA_XXCH_SIDE_REAR_RIGHT = 0x0000010, |
| DCA_XXCH_LFE1 = 0x0000020, |
| DCA_XXCH_REAR_CENTER = 0x0000040, |
| DCA_XXCH_SURROUND_REAR_LEFT = 0x0000080, |
| DCA_XXCH_SURROUND_REAR_RIGHT = 0x0000100, |
| DCA_XXCH_SIDE_SURROUND_LEFT = 0x0000200, |
| DCA_XXCH_SIDE_SURROUND_RIGHT = 0x0000400, |
| DCA_XXCH_FRONT_CENTER_LEFT = 0x0000800, |
| DCA_XXCH_FRONT_CENTER_RIGHT = 0x0001000, |
| DCA_XXCH_FRONT_HIGH_LEFT = 0x0002000, |
| DCA_XXCH_FRONT_HIGH_CENTER = 0x0004000, |
| DCA_XXCH_FRONT_HIGH_RIGHT = 0x0008000, |
| DCA_XXCH_LFE2 = 0x0010000, |
| DCA_XXCH_SIDE_FRONT_LEFT = 0x0020000, |
| DCA_XXCH_SIDE_FRONT_RIGHT = 0x0040000, |
| DCA_XXCH_OVERHEAD = 0x0080000, |
| DCA_XXCH_SIDE_HIGH_LEFT = 0x0100000, |
| DCA_XXCH_SIDE_HIGH_RIGHT = 0x0200000, |
| DCA_XXCH_REAR_HIGH_CENTER = 0x0400000, |
| DCA_XXCH_REAR_HIGH_LEFT = 0x0800000, |
| DCA_XXCH_REAR_HIGH_RIGHT = 0x1000000, |
| DCA_XXCH_REAR_LOW_CENTER = 0x2000000, |
| DCA_XXCH_REAR_LOW_LEFT = 0x4000000, |
| DCA_XXCH_REAR_LOW_RIGHT = 0x8000000, |
| }; |
| |
| static const uint32_t map_xxch_to_native[28] = { |
| AV_CH_FRONT_CENTER, |
| AV_CH_FRONT_LEFT, |
| AV_CH_FRONT_RIGHT, |
| AV_CH_SIDE_LEFT, |
| AV_CH_SIDE_RIGHT, |
| AV_CH_LOW_FREQUENCY, |
| AV_CH_BACK_CENTER, |
| AV_CH_BACK_LEFT, |
| AV_CH_BACK_RIGHT, |
| AV_CH_SIDE_LEFT, /* side surround left -- dup sur side L */ |
| AV_CH_SIDE_RIGHT, /* side surround right -- dup sur side R */ |
| AV_CH_FRONT_LEFT_OF_CENTER, |
| AV_CH_FRONT_RIGHT_OF_CENTER, |
| AV_CH_TOP_FRONT_LEFT, |
| AV_CH_TOP_FRONT_CENTER, |
| AV_CH_TOP_FRONT_RIGHT, |
| AV_CH_LOW_FREQUENCY, /* lfe2 -- duplicate lfe1 position */ |
| AV_CH_FRONT_LEFT_OF_CENTER, /* side front left -- dup front cntr L */ |
| AV_CH_FRONT_RIGHT_OF_CENTER,/* side front right -- dup front cntr R */ |
| AV_CH_TOP_CENTER, /* overhead */ |
| AV_CH_TOP_FRONT_LEFT, /* side high left -- dup */ |
| AV_CH_TOP_FRONT_RIGHT, /* side high right -- dup */ |
| AV_CH_TOP_BACK_CENTER, |
| AV_CH_TOP_BACK_LEFT, |
| AV_CH_TOP_BACK_RIGHT, |
| AV_CH_BACK_CENTER, /* rear low center -- dup */ |
| AV_CH_BACK_LEFT, /* rear low left -- dup */ |
| AV_CH_BACK_RIGHT /* read low right -- dup */ |
| }; |
| |
| enum DCAExtensionMask { |
| DCA_EXT_CORE = 0x001, ///< core in core substream |
| DCA_EXT_XXCH = 0x002, ///< XXCh channels extension in core substream |
| DCA_EXT_X96 = 0x004, ///< 96/24 extension in core substream |
| DCA_EXT_XCH = 0x008, ///< XCh channel extension in core substream |
| DCA_EXT_EXSS_CORE = 0x010, ///< core in ExSS (extension substream) |
| DCA_EXT_EXSS_XBR = 0x020, ///< extended bitrate extension in ExSS |
| DCA_EXT_EXSS_XXCH = 0x040, ///< XXCh channels extension in ExSS |
| DCA_EXT_EXSS_X96 = 0x080, ///< 96/24 extension in ExSS |
| DCA_EXT_EXSS_LBR = 0x100, ///< low bitrate component in ExSS |
| DCA_EXT_EXSS_XLL = 0x200, ///< lossless extension in ExSS |
| }; |
| |
| /* -1 are reserved or unknown */ |
| static const int dca_ext_audio_descr_mask[] = { |
| DCA_EXT_XCH, |
| -1, |
| DCA_EXT_X96, |
| DCA_EXT_XCH | DCA_EXT_X96, |
| -1, |
| -1, |
| DCA_EXT_XXCH, |
| -1, |
| }; |
| |
| /* extensions that reside in core substream */ |
| #define DCA_CORE_EXTS (DCA_EXT_XCH | DCA_EXT_XXCH | DCA_EXT_X96) |
| |
| /* Tables for mapping dts channel configurations to libavcodec multichannel api. |
| * Some compromises have been made for special configurations. Most configurations |
| * are never used so complete accuracy is not needed. |
| * |
| * L = left, R = right, C = center, S = surround, F = front, R = rear, T = total, OV = overhead. |
| * S -> side, when both rear and back are configured move one of them to the side channel |
| * OV -> center back |
| * All 2 channel configurations -> AV_CH_LAYOUT_STEREO |
| */ |
| static const uint64_t dca_core_channel_layout[] = { |
| AV_CH_FRONT_CENTER, ///< 1, A |
| AV_CH_LAYOUT_STEREO, ///< 2, A + B (dual mono) |
| AV_CH_LAYOUT_STEREO, ///< 2, L + R (stereo) |
| AV_CH_LAYOUT_STEREO, ///< 2, (L + R) + (L - R) (sum-difference) |
| AV_CH_LAYOUT_STEREO, ///< 2, LT + RT (left and right total) |
| AV_CH_LAYOUT_STEREO | AV_CH_FRONT_CENTER, ///< 3, C + L + R |
| AV_CH_LAYOUT_STEREO | AV_CH_BACK_CENTER, ///< 3, L + R + S |
| AV_CH_LAYOUT_STEREO | AV_CH_FRONT_CENTER | AV_CH_BACK_CENTER, ///< 4, C + L + R + S |
| AV_CH_LAYOUT_STEREO | AV_CH_SIDE_LEFT | AV_CH_SIDE_RIGHT, ///< 4, L + R + SL + SR |
| |
| AV_CH_LAYOUT_STEREO | AV_CH_FRONT_CENTER | AV_CH_SIDE_LEFT | |
| AV_CH_SIDE_RIGHT, ///< 5, C + L + R + SL + SR |
| |
| AV_CH_LAYOUT_STEREO | AV_CH_SIDE_LEFT | AV_CH_SIDE_RIGHT | |
| AV_CH_FRONT_LEFT_OF_CENTER | AV_CH_FRONT_RIGHT_OF_CENTER, ///< 6, CL + CR + L + R + SL + SR |
| |
| AV_CH_LAYOUT_STEREO | AV_CH_BACK_LEFT | AV_CH_BACK_RIGHT | |
| AV_CH_FRONT_CENTER | AV_CH_BACK_CENTER, ///< 6, C + L + R + LR + RR + OV |
| |
| AV_CH_FRONT_CENTER | AV_CH_FRONT_RIGHT_OF_CENTER | |
| AV_CH_FRONT_LEFT_OF_CENTER | AV_CH_BACK_CENTER | |
| AV_CH_BACK_LEFT | AV_CH_BACK_RIGHT, ///< 6, CF + CR + LF + RF + LR + RR |
| |
| AV_CH_FRONT_LEFT_OF_CENTER | AV_CH_FRONT_CENTER | |
| AV_CH_FRONT_RIGHT_OF_CENTER | AV_CH_LAYOUT_STEREO | |
| AV_CH_SIDE_LEFT | AV_CH_SIDE_RIGHT, ///< 7, CL + C + CR + L + R + SL + SR |
| |
| AV_CH_FRONT_LEFT_OF_CENTER | AV_CH_FRONT_RIGHT_OF_CENTER | |
| AV_CH_LAYOUT_STEREO | AV_CH_SIDE_LEFT | AV_CH_SIDE_RIGHT | |
| AV_CH_BACK_LEFT | AV_CH_BACK_RIGHT, ///< 8, CL + CR + L + R + SL1 + SL2 + SR1 + SR2 |
| |
| AV_CH_FRONT_LEFT_OF_CENTER | AV_CH_FRONT_CENTER | |
| AV_CH_FRONT_RIGHT_OF_CENTER | AV_CH_LAYOUT_STEREO | |
| AV_CH_SIDE_LEFT | AV_CH_BACK_CENTER | AV_CH_SIDE_RIGHT, ///< 8, CL + C + CR + L + R + SL + S + SR |
| }; |
| |
| static const int8_t dca_lfe_index[] = { |
| 1, 2, 2, 2, 2, 3, 2, 3, 2, 3, 2, 3, 1, 3, 2, 3 |
| }; |
| |
| static const int8_t dca_channel_reorder_lfe[][9] = { |
| { 0, -1, -1, -1, -1, -1, -1, -1, -1}, |
| { 0, 1, -1, -1, -1, -1, -1, -1, -1}, |
| { 0, 1, -1, -1, -1, -1, -1, -1, -1}, |
| { 0, 1, -1, -1, -1, -1, -1, -1, -1}, |
| { 0, 1, -1, -1, -1, -1, -1, -1, -1}, |
| { 2, 0, 1, -1, -1, -1, -1, -1, -1}, |
| { 0, 1, 3, -1, -1, -1, -1, -1, -1}, |
| { 2, 0, 1, 4, -1, -1, -1, -1, -1}, |
| { 0, 1, 3, 4, -1, -1, -1, -1, -1}, |
| { 2, 0, 1, 4, 5, -1, -1, -1, -1}, |
| { 3, 4, 0, 1, 5, 6, -1, -1, -1}, |
| { 2, 0, 1, 4, 5, 6, -1, -1, -1}, |
| { 0, 6, 4, 5, 2, 3, -1, -1, -1}, |
| { 4, 2, 5, 0, 1, 6, 7, -1, -1}, |
| { 5, 6, 0, 1, 7, 3, 8, 4, -1}, |
| { 4, 2, 5, 0, 1, 6, 8, 7, -1}, |
| }; |
| |
| static const int8_t dca_channel_reorder_lfe_xch[][9] = { |
| { 0, 2, -1, -1, -1, -1, -1, -1, -1}, |
| { 0, 1, 3, -1, -1, -1, -1, -1, -1}, |
| { 0, 1, 3, -1, -1, -1, -1, -1, -1}, |
| { 0, 1, 3, -1, -1, -1, -1, -1, -1}, |
| { 0, 1, 3, -1, -1, -1, -1, -1, -1}, |
| { 2, 0, 1, 4, -1, -1, -1, -1, -1}, |
| { 0, 1, 3, 4, -1, -1, -1, -1, -1}, |
| { 2, 0, 1, 4, 5, -1, -1, -1, -1}, |
| { 0, 1, 4, 5, 3, -1, -1, -1, -1}, |
| { 2, 0, 1, 5, 6, 4, -1, -1, -1}, |
| { 3, 4, 0, 1, 6, 7, 5, -1, -1}, |
| { 2, 0, 1, 4, 5, 6, 7, -1, -1}, |
| { 0, 6, 4, 5, 2, 3, 7, -1, -1}, |
| { 4, 2, 5, 0, 1, 7, 8, 6, -1}, |
| { 5, 6, 0, 1, 8, 3, 9, 4, 7}, |
| { 4, 2, 5, 0, 1, 6, 9, 8, 7}, |
| }; |
| |
| static const int8_t dca_channel_reorder_nolfe[][9] = { |
| { 0, -1, -1, -1, -1, -1, -1, -1, -1}, |
| { 0, 1, -1, -1, -1, -1, -1, -1, -1}, |
| { 0, 1, -1, -1, -1, -1, -1, -1, -1}, |
| { 0, 1, -1, -1, -1, -1, -1, -1, -1}, |
| { 0, 1, -1, -1, -1, -1, -1, -1, -1}, |
| { 2, 0, 1, -1, -1, -1, -1, -1, -1}, |
| { 0, 1, 2, -1, -1, -1, -1, -1, -1}, |
| { 2, 0, 1, 3, -1, -1, -1, -1, -1}, |
| { 0, 1, 2, 3, -1, -1, -1, -1, -1}, |
| { 2, 0, 1, 3, 4, -1, -1, -1, -1}, |
| { 2, 3, 0, 1, 4, 5, -1, -1, -1}, |
| { 2, 0, 1, 3, 4, 5, -1, -1, -1}, |
| { 0, 5, 3, 4, 1, 2, -1, -1, -1}, |
| { 3, 2, 4, 0, 1, 5, 6, -1, -1}, |
| { 4, 5, 0, 1, 6, 2, 7, 3, -1}, |
| { 3, 2, 4, 0, 1, 5, 7, 6, -1}, |
| }; |
| |
| static const int8_t dca_channel_reorder_nolfe_xch[][9] = { |
| { 0, 1, -1, -1, -1, -1, -1, -1, -1}, |
| { 0, 1, 2, -1, -1, -1, -1, -1, -1}, |
| { 0, 1, 2, -1, -1, -1, -1, -1, -1}, |
| { 0, 1, 2, -1, -1, -1, -1, -1, -1}, |
| { 0, 1, 2, -1, -1, -1, -1, -1, -1}, |
| { 2, 0, 1, 3, -1, -1, -1, -1, -1}, |
| { 0, 1, 2, 3, -1, -1, -1, -1, -1}, |
| { 2, 0, 1, 3, 4, -1, -1, -1, -1}, |
| { 0, 1, 3, 4, 2, -1, -1, -1, -1}, |
| { 2, 0, 1, 4, 5, 3, -1, -1, -1}, |
| { 2, 3, 0, 1, 5, 6, 4, -1, -1}, |
| { 2, 0, 1, 3, 4, 5, 6, -1, -1}, |
| { 0, 5, 3, 4, 1, 2, 6, -1, -1}, |
| { 3, 2, 4, 0, 1, 6, 7, 5, -1}, |
| { 4, 5, 0, 1, 7, 2, 8, 3, 6}, |
| { 3, 2, 4, 0, 1, 5, 8, 7, 6}, |
| }; |
| |
| #define DCA_DOLBY 101 /* FIXME */ |
| |
| #define DCA_CHANNEL_BITS 6 |
| #define DCA_CHANNEL_MASK 0x3F |
| |
| #define DCA_LFE 0x80 |
| |
| #define HEADER_SIZE 14 |
| |
| #define DCA_MAX_FRAME_SIZE 16384 |
| #define DCA_MAX_EXSS_HEADER_SIZE 4096 |
| |
| #define DCA_BUFFER_PADDING_SIZE 1024 |
| |
| #define DCA_NSYNCAUX 0x9A1105A0 |
| |
| /** Bit allocation */ |
| typedef struct { |
| int offset; ///< code values offset |
| int maxbits[8]; ///< max bits in VLC |
| int wrap; ///< wrap for get_vlc2() |
| VLC vlc[8]; ///< actual codes |
| } BitAlloc; |
| |
| static BitAlloc dca_bitalloc_index; ///< indexes for samples VLC select |
| static BitAlloc dca_tmode; ///< transition mode VLCs |
| static BitAlloc dca_scalefactor; ///< scalefactor VLCs |
| static BitAlloc dca_smpl_bitalloc[11]; ///< samples VLCs |
| |
| static av_always_inline int get_bitalloc(GetBitContext *gb, BitAlloc *ba, |
| int idx) |
| { |
| return get_vlc2(gb, ba->vlc[idx].table, ba->vlc[idx].bits, ba->wrap) + |
| ba->offset; |
| } |
| |
| typedef struct { |
| const AVClass *class; ///< class for AVOptions |
| AVCodecContext *avctx; |
| /* Frame header */ |
| int frame_type; ///< type of the current frame |
| int samples_deficit; ///< deficit sample count |
| int crc_present; ///< crc is present in the bitstream |
| int sample_blocks; ///< number of PCM sample blocks |
| int frame_size; ///< primary frame byte size |
| int amode; ///< audio channels arrangement |
| int sample_rate; ///< audio sampling rate |
| int bit_rate; ///< transmission bit rate |
| int bit_rate_index; ///< transmission bit rate index |
| |
| int dynrange; ///< embedded dynamic range flag |
| int timestamp; ///< embedded time stamp flag |
| int aux_data; ///< auxiliary data flag |
| int hdcd; ///< source material is mastered in HDCD |
| int ext_descr; ///< extension audio descriptor flag |
| int ext_coding; ///< extended coding flag |
| int aspf; ///< audio sync word insertion flag |
| int lfe; ///< low frequency effects flag |
| int predictor_history; ///< predictor history flag |
| int header_crc; ///< header crc check bytes |
| int multirate_inter; ///< multirate interpolator switch |
| int version; ///< encoder software revision |
| int copy_history; ///< copy history |
| int source_pcm_res; ///< source pcm resolution |
| int front_sum; ///< front sum/difference flag |
| int surround_sum; ///< surround sum/difference flag |
| int dialog_norm; ///< dialog normalisation parameter |
| |
| /* Primary audio coding header */ |
| int subframes; ///< number of subframes |
| int total_channels; ///< number of channels including extensions |
| int prim_channels; ///< number of primary audio channels |
| int subband_activity[DCA_PRIM_CHANNELS_MAX]; ///< subband activity count |
| int vq_start_subband[DCA_PRIM_CHANNELS_MAX]; ///< high frequency vq start subband |
| int joint_intensity[DCA_PRIM_CHANNELS_MAX]; ///< joint intensity coding index |
| int transient_huffman[DCA_PRIM_CHANNELS_MAX]; ///< transient mode code book |
| int scalefactor_huffman[DCA_PRIM_CHANNELS_MAX]; ///< scale factor code book |
| int bitalloc_huffman[DCA_PRIM_CHANNELS_MAX]; ///< bit allocation quantizer select |
| int quant_index_huffman[DCA_PRIM_CHANNELS_MAX][DCA_ABITS_MAX]; ///< quantization index codebook select |
| float scalefactor_adj[DCA_PRIM_CHANNELS_MAX][DCA_ABITS_MAX]; ///< scale factor adjustment |
| |
| /* Primary audio coding side information */ |
| int subsubframes[DCA_SUBFRAMES_MAX]; ///< number of subsubframes |
| int partial_samples[DCA_SUBFRAMES_MAX]; ///< partial subsubframe samples count |
| int prediction_mode[DCA_PRIM_CHANNELS_MAX][DCA_SUBBANDS]; ///< prediction mode (ADPCM used or not) |
| int prediction_vq[DCA_PRIM_CHANNELS_MAX][DCA_SUBBANDS]; ///< prediction VQ coefs |
| int bitalloc[DCA_PRIM_CHANNELS_MAX][DCA_SUBBANDS]; ///< bit allocation index |
| int transition_mode[DCA_PRIM_CHANNELS_MAX][DCA_SUBBANDS]; ///< transition mode (transients) |
| int32_t scale_factor[DCA_PRIM_CHANNELS_MAX][DCA_SUBBANDS][2];///< scale factors (2 if transient) |
| int joint_huff[DCA_PRIM_CHANNELS_MAX]; ///< joint subband scale factors codebook |
| int joint_scale_factor[DCA_PRIM_CHANNELS_MAX][DCA_SUBBANDS]; ///< joint subband scale factors |
| float downmix_coef[DCA_PRIM_CHANNELS_MAX + 1][2]; ///< stereo downmix coefficients |
| int dynrange_coef; ///< dynamic range coefficient |
| |
| /* Core substream's embedded downmix coefficients (cf. ETSI TS 102 114 V1.4.1) |
| * Input: primary audio channels (incl. LFE if present) |
| * Output: downmix audio channels (up to 4, no LFE) */ |
| uint8_t core_downmix; ///< embedded downmix coefficients available |
| uint8_t core_downmix_amode; ///< audio channel arrangement of embedded downmix |
| uint16_t core_downmix_codes[DCA_PRIM_CHANNELS_MAX + 1][4]; ///< embedded downmix coefficients (9-bit codes) |
| |
| int32_t high_freq_vq[DCA_PRIM_CHANNELS_MAX][DCA_SUBBANDS]; ///< VQ encoded high frequency subbands |
| |
| float lfe_data[2 * DCA_LFE_MAX * (DCA_BLOCKS_MAX + 4)]; ///< Low frequency effect data |
| int lfe_scale_factor; |
| |
| /* Subband samples history (for ADPCM) */ |
| DECLARE_ALIGNED(16, float, subband_samples_hist)[DCA_PRIM_CHANNELS_MAX][DCA_SUBBANDS][4]; |
| DECLARE_ALIGNED(32, float, subband_fir_hist)[DCA_PRIM_CHANNELS_MAX][512]; |
| DECLARE_ALIGNED(32, float, subband_fir_noidea)[DCA_PRIM_CHANNELS_MAX][32]; |
| int hist_index[DCA_PRIM_CHANNELS_MAX]; |
| DECLARE_ALIGNED(32, float, raXin)[32]; |
| |
| int output; ///< type of output |
| |
| DECLARE_ALIGNED(32, float, subband_samples)[DCA_BLOCKS_MAX][DCA_PRIM_CHANNELS_MAX][DCA_SUBBANDS][8]; |
| float *samples_chanptr[DCA_PRIM_CHANNELS_MAX + 1]; |
| float *extra_channels[DCA_PRIM_CHANNELS_MAX + 1]; |
| uint8_t *extra_channels_buffer; |
| unsigned int extra_channels_buffer_size; |
| |
| uint8_t dca_buffer[DCA_MAX_FRAME_SIZE + DCA_MAX_EXSS_HEADER_SIZE + DCA_BUFFER_PADDING_SIZE]; |
| int dca_buffer_size; ///< how much data is in the dca_buffer |
| |
| const int8_t *channel_order_tab; ///< channel reordering table, lfe and non lfe |
| GetBitContext gb; |
| /* Current position in DCA frame */ |
| int current_subframe; |
| int current_subsubframe; |
| |
| int core_ext_mask; ///< present extensions in the core substream |
| |
| /* XCh extension information */ |
| int xch_present; ///< XCh extension present and valid |
| int xch_base_channel; ///< index of first (only) channel containing XCH data |
| int xch_disable; ///< whether the XCh extension should be decoded or not |
| |
| /* XXCH extension information */ |
| int xxch_chset; |
| int xxch_nbits_spk_mask; |
| uint32_t xxch_core_spkmask; |
| uint32_t xxch_spk_masks[4]; /* speaker masks, last element is core mask */ |
| int xxch_chset_nch[4]; |
| float xxch_dmix_sf[DCA_CHSETS_MAX]; |
| |
| uint32_t xxch_dmix_embedded; /* lower layer has mix pre-embedded, per chset */ |
| float xxch_dmix_coeff[DCA_PRIM_CHANNELS_MAX][32]; /* worst case sizing */ |
| |
| int8_t xxch_order_tab[32]; |
| int8_t lfe_index; |
| |
| /* ExSS header parser */ |
| int static_fields; ///< static fields present |
| int mix_metadata; ///< mixing metadata present |
| int num_mix_configs; ///< number of mix out configurations |
| int mix_config_num_ch[4]; ///< number of channels in each mix out configuration |
| |
| int profile; |
| |
| int debug_flag; ///< used for suppressing repeated error messages output |
| AVFloatDSPContext fdsp; |
| FFTContext imdct; |
| SynthFilterContext synth; |
| DCADSPContext dcadsp; |
| FmtConvertContext fmt_conv; |
| } DCAContext; |
| |
| static const uint16_t dca_vlc_offs[] = { |
| 0, 512, 640, 768, 1282, 1794, 2436, 3080, 3770, 4454, 5364, |
| 5372, 5380, 5388, 5392, 5396, 5412, 5420, 5428, 5460, 5492, 5508, |
| 5572, 5604, 5668, 5796, 5860, 5892, 6412, 6668, 6796, 7308, 7564, |
| 7820, 8076, 8620, 9132, 9388, 9910, 10166, 10680, 11196, 11726, 12240, |
| 12752, 13298, 13810, 14326, 14840, 15500, 16022, 16540, 17158, 17678, 18264, |
| 18796, 19352, 19926, 20468, 21472, 22398, 23014, 23622, |
| }; |
| |
| static av_cold void dca_init_vlcs(void) |
| { |
| static int vlcs_initialized = 0; |
| int i, j, c = 14; |
| static VLC_TYPE dca_table[23622][2]; |
| |
| if (vlcs_initialized) |
| return; |
| |
| dca_bitalloc_index.offset = 1; |
| dca_bitalloc_index.wrap = 2; |
| for (i = 0; i < 5; i++) { |
| dca_bitalloc_index.vlc[i].table = &dca_table[dca_vlc_offs[i]]; |
| dca_bitalloc_index.vlc[i].table_allocated = dca_vlc_offs[i + 1] - dca_vlc_offs[i]; |
| init_vlc(&dca_bitalloc_index.vlc[i], bitalloc_12_vlc_bits[i], 12, |
| bitalloc_12_bits[i], 1, 1, |
| bitalloc_12_codes[i], 2, 2, INIT_VLC_USE_NEW_STATIC); |
| } |
| dca_scalefactor.offset = -64; |
| dca_scalefactor.wrap = 2; |
| for (i = 0; i < 5; i++) { |
| dca_scalefactor.vlc[i].table = &dca_table[dca_vlc_offs[i + 5]]; |
| dca_scalefactor.vlc[i].table_allocated = dca_vlc_offs[i + 6] - dca_vlc_offs[i + 5]; |
| init_vlc(&dca_scalefactor.vlc[i], SCALES_VLC_BITS, 129, |
| scales_bits[i], 1, 1, |
| scales_codes[i], 2, 2, INIT_VLC_USE_NEW_STATIC); |
| } |
| dca_tmode.offset = 0; |
| dca_tmode.wrap = 1; |
| for (i = 0; i < 4; i++) { |
| dca_tmode.vlc[i].table = &dca_table[dca_vlc_offs[i + 10]]; |
| dca_tmode.vlc[i].table_allocated = dca_vlc_offs[i + 11] - dca_vlc_offs[i + 10]; |
| init_vlc(&dca_tmode.vlc[i], tmode_vlc_bits[i], 4, |
| tmode_bits[i], 1, 1, |
| tmode_codes[i], 2, 2, INIT_VLC_USE_NEW_STATIC); |
| } |
| |
| for (i = 0; i < 10; i++) |
| for (j = 0; j < 7; j++) { |
| if (!bitalloc_codes[i][j]) |
| break; |
| dca_smpl_bitalloc[i + 1].offset = bitalloc_offsets[i]; |
| dca_smpl_bitalloc[i + 1].wrap = 1 + (j > 4); |
| dca_smpl_bitalloc[i + 1].vlc[j].table = &dca_table[dca_vlc_offs[c]]; |
| dca_smpl_bitalloc[i + 1].vlc[j].table_allocated = dca_vlc_offs[c + 1] - dca_vlc_offs[c]; |
| |
| init_vlc(&dca_smpl_bitalloc[i + 1].vlc[j], bitalloc_maxbits[i][j], |
| bitalloc_sizes[i], |
| bitalloc_bits[i][j], 1, 1, |
| bitalloc_codes[i][j], 2, 2, INIT_VLC_USE_NEW_STATIC); |
| c++; |
| } |
| vlcs_initialized = 1; |
| } |
| |
| static inline void get_array(GetBitContext *gb, int *dst, int len, int bits) |
| { |
| while (len--) |
| *dst++ = get_bits(gb, bits); |
| } |
| |
| static inline int dca_xxch2index(DCAContext *s, int xxch_ch) |
| { |
| int i, base, mask; |
| |
| /* locate channel set containing the channel */ |
| for (i = -1, base = 0, mask = (s->xxch_core_spkmask & ~DCA_XXCH_LFE1); |
| i <= s->xxch_chset && !(mask & xxch_ch); mask = s->xxch_spk_masks[++i]) |
| base += av_popcount(mask); |
| |
| return base + av_popcount(mask & (xxch_ch - 1)); |
| } |
| |
| static int dca_parse_audio_coding_header(DCAContext *s, int base_channel, |
| int xxch) |
| { |
| int i, j; |
| static const float adj_table[4] = { 1.0, 1.1250, 1.2500, 1.4375 }; |
| static const int bitlen[11] = { 0, 1, 2, 2, 2, 2, 3, 3, 3, 3, 3 }; |
| static const int thr[11] = { 0, 1, 3, 3, 3, 3, 7, 7, 7, 7, 7 }; |
| int hdr_pos = 0, hdr_size = 0; |
| float sign, mag, scale_factor; |
| int this_chans, acc_mask; |
| int embedded_downmix; |
| int nchans, mask[8]; |
| int coeff, ichan; |
| |
| /* xxch has arbitrary sized audio coding headers */ |
| if (xxch) { |
| hdr_pos = get_bits_count(&s->gb); |
| hdr_size = get_bits(&s->gb, 7) + 1; |
| } |
| |
| nchans = get_bits(&s->gb, 3) + 1; |
| if (xxch && nchans >= 3) { |
| av_log(s->avctx, AV_LOG_ERROR, "nchans %d is too large\n", nchans); |
| return AVERROR_INVALIDDATA; |
| } else if (nchans + base_channel > DCA_PRIM_CHANNELS_MAX) { |
| av_log(s->avctx, AV_LOG_ERROR, "channel sum %d + %d is too large\n", nchans, base_channel); |
| return AVERROR_INVALIDDATA; |
| } |
| |
| s->total_channels = nchans + base_channel; |
| s->prim_channels = s->total_channels; |
| |
| /* obtain speaker layout mask & downmix coefficients for XXCH */ |
| if (xxch) { |
| acc_mask = s->xxch_core_spkmask; |
| |
| this_chans = get_bits(&s->gb, s->xxch_nbits_spk_mask - 6) << 6; |
| s->xxch_spk_masks[s->xxch_chset] = this_chans; |
| s->xxch_chset_nch[s->xxch_chset] = nchans; |
| |
| for (i = 0; i <= s->xxch_chset; i++) |
| acc_mask |= s->xxch_spk_masks[i]; |
| |
| /* check for downmixing information */ |
| if (get_bits1(&s->gb)) { |
| embedded_downmix = get_bits1(&s->gb); |
| scale_factor = |
| 1.0f / dca_dmixtable[(get_bits(&s->gb, 6) - 1) << 2]; |
| |
| s->xxch_dmix_sf[s->xxch_chset] = scale_factor; |
| |
| for (i = base_channel; i < s->prim_channels; i++) { |
| mask[i] = get_bits(&s->gb, s->xxch_nbits_spk_mask); |
| } |
| |
| for (j = base_channel; j < s->prim_channels; j++) { |
| memset(s->xxch_dmix_coeff[j], 0, sizeof(s->xxch_dmix_coeff[0])); |
| s->xxch_dmix_embedded |= (embedded_downmix << j); |
| for (i = 0; i < s->xxch_nbits_spk_mask; i++) { |
| if (mask[j] & (1 << i)) { |
| if ((1 << i) == DCA_XXCH_LFE1) { |
| av_log(s->avctx, AV_LOG_WARNING, |
| "DCA-XXCH: dmix to LFE1 not supported.\n"); |
| continue; |
| } |
| |
| coeff = get_bits(&s->gb, 7); |
| sign = (coeff & 64) ? 1.0 : -1.0; |
| mag = dca_dmixtable[((coeff & 63) - 1) << 2]; |
| ichan = dca_xxch2index(s, 1 << i); |
| s->xxch_dmix_coeff[j][ichan] = sign * mag; |
| } |
| } |
| } |
| } |
| } |
| |
| if (s->prim_channels > DCA_PRIM_CHANNELS_MAX) |
| s->prim_channels = DCA_PRIM_CHANNELS_MAX; |
| |
| |
| for (i = base_channel; i < s->prim_channels; i++) { |
| s->subband_activity[i] = get_bits(&s->gb, 5) + 2; |
| if (s->subband_activity[i] > DCA_SUBBANDS) |
| s->subband_activity[i] = DCA_SUBBANDS; |
| } |
| for (i = base_channel; i < s->prim_channels; i++) { |
| s->vq_start_subband[i] = get_bits(&s->gb, 5) + 1; |
| if (s->vq_start_subband[i] > DCA_SUBBANDS) |
| s->vq_start_subband[i] = DCA_SUBBANDS; |
| } |
| get_array(&s->gb, s->joint_intensity + base_channel, s->prim_channels - base_channel, 3); |
| get_array(&s->gb, s->transient_huffman + base_channel, s->prim_channels - base_channel, 2); |
| get_array(&s->gb, s->scalefactor_huffman + base_channel, s->prim_channels - base_channel, 3); |
| get_array(&s->gb, s->bitalloc_huffman + base_channel, s->prim_channels - base_channel, 3); |
| |
| /* Get codebooks quantization indexes */ |
| if (!base_channel) |
| memset(s->quant_index_huffman, 0, sizeof(s->quant_index_huffman)); |
| for (j = 1; j < 11; j++) |
| for (i = base_channel; i < s->prim_channels; i++) |
| s->quant_index_huffman[i][j] = get_bits(&s->gb, bitlen[j]); |
| |
| /* Get scale factor adjustment */ |
| for (j = 0; j < 11; j++) |
| for (i = base_channel; i < s->prim_channels; i++) |
| s->scalefactor_adj[i][j] = 1; |
| |
| for (j = 1; j < 11; j++) |
| for (i = base_channel; i < s->prim_channels; i++) |
| if (s->quant_index_huffman[i][j] < thr[j]) |
| s->scalefactor_adj[i][j] = adj_table[get_bits(&s->gb, 2)]; |
| |
| if (!xxch) { |
| if (s->crc_present) { |
| /* Audio header CRC check */ |
| get_bits(&s->gb, 16); |
| } |
| } else { |
| /* Skip to the end of the header, also ignore CRC if present */ |
| i = get_bits_count(&s->gb); |
| if (hdr_pos + 8 * hdr_size > i) |
| skip_bits_long(&s->gb, hdr_pos + 8 * hdr_size - i); |
| } |
| |
| s->current_subframe = 0; |
| s->current_subsubframe = 0; |
| |
| #ifdef TRACE |
| av_log(s->avctx, AV_LOG_DEBUG, "subframes: %i\n", s->subframes); |
| av_log(s->avctx, AV_LOG_DEBUG, "prim channels: %i\n", s->prim_channels); |
| for (i = base_channel; i < s->prim_channels; i++) { |
| av_log(s->avctx, AV_LOG_DEBUG, "subband activity: %i\n", |
| s->subband_activity[i]); |
| av_log(s->avctx, AV_LOG_DEBUG, "vq start subband: %i\n", |
| s->vq_start_subband[i]); |
| av_log(s->avctx, AV_LOG_DEBUG, "joint intensity: %i\n", |
| s->joint_intensity[i]); |
| av_log(s->avctx, AV_LOG_DEBUG, "transient mode codebook: %i\n", |
| s->transient_huffman[i]); |
| av_log(s->avctx, AV_LOG_DEBUG, "scale factor codebook: %i\n", |
| s->scalefactor_huffman[i]); |
| av_log(s->avctx, AV_LOG_DEBUG, "bit allocation quantizer: %i\n", |
| s->bitalloc_huffman[i]); |
| av_log(s->avctx, AV_LOG_DEBUG, "quant index huff:"); |
| for (j = 0; j < 11; j++) |
| av_log(s->avctx, AV_LOG_DEBUG, " %i", s->quant_index_huffman[i][j]); |
| av_log(s->avctx, AV_LOG_DEBUG, "\n"); |
| av_log(s->avctx, AV_LOG_DEBUG, "scalefac adj:"); |
| for (j = 0; j < 11; j++) |
| av_log(s->avctx, AV_LOG_DEBUG, " %1.3f", s->scalefactor_adj[i][j]); |
| av_log(s->avctx, AV_LOG_DEBUG, "\n"); |
| } |
| #endif |
| |
| return 0; |
| } |
| |
| static int dca_parse_frame_header(DCAContext *s) |
| { |
| init_get_bits(&s->gb, s->dca_buffer, s->dca_buffer_size * 8); |
| |
| /* Sync code */ |
| skip_bits_long(&s->gb, 32); |
| |
| /* Frame header */ |
| s->frame_type = get_bits(&s->gb, 1); |
| s->samples_deficit = get_bits(&s->gb, 5) + 1; |
| s->crc_present = get_bits(&s->gb, 1); |
| s->sample_blocks = get_bits(&s->gb, 7) + 1; |
| s->frame_size = get_bits(&s->gb, 14) + 1; |
| if (s->frame_size < 95) |
| return AVERROR_INVALIDDATA; |
| s->amode = get_bits(&s->gb, 6); |
| s->sample_rate = avpriv_dca_sample_rates[get_bits(&s->gb, 4)]; |
| if (!s->sample_rate) |
| return AVERROR_INVALIDDATA; |
| s->bit_rate_index = get_bits(&s->gb, 5); |
| s->bit_rate = dca_bit_rates[s->bit_rate_index]; |
| if (!s->bit_rate) |
| return AVERROR_INVALIDDATA; |
| |
| skip_bits1(&s->gb); // always 0 (reserved, cf. ETSI TS 102 114 V1.4.1) |
| s->dynrange = get_bits(&s->gb, 1); |
| s->timestamp = get_bits(&s->gb, 1); |
| s->aux_data = get_bits(&s->gb, 1); |
| s->hdcd = get_bits(&s->gb, 1); |
| s->ext_descr = get_bits(&s->gb, 3); |
| s->ext_coding = get_bits(&s->gb, 1); |
| s->aspf = get_bits(&s->gb, 1); |
| s->lfe = get_bits(&s->gb, 2); |
| s->predictor_history = get_bits(&s->gb, 1); |
| |
| if (s->lfe > 2) { |
| s->lfe = 0; |
| av_log(s->avctx, AV_LOG_ERROR, "Invalid LFE value: %d\n", s->lfe); |
| return AVERROR_INVALIDDATA; |
| } |
| |
| /* TODO: check CRC */ |
| if (s->crc_present) |
| s->header_crc = get_bits(&s->gb, 16); |
| |
| s->multirate_inter = get_bits(&s->gb, 1); |
| s->version = get_bits(&s->gb, 4); |
| s->copy_history = get_bits(&s->gb, 2); |
| s->source_pcm_res = get_bits(&s->gb, 3); |
| s->front_sum = get_bits(&s->gb, 1); |
| s->surround_sum = get_bits(&s->gb, 1); |
| s->dialog_norm = get_bits(&s->gb, 4); |
| |
| /* FIXME: channels mixing levels */ |
| s->output = s->amode; |
| if (s->lfe) |
| s->output |= DCA_LFE; |
| |
| #ifdef TRACE |
| av_log(s->avctx, AV_LOG_DEBUG, "frame type: %i\n", s->frame_type); |
| av_log(s->avctx, AV_LOG_DEBUG, "samples deficit: %i\n", s->samples_deficit); |
| av_log(s->avctx, AV_LOG_DEBUG, "crc present: %i\n", s->crc_present); |
| av_log(s->avctx, AV_LOG_DEBUG, "sample blocks: %i (%i samples)\n", |
| s->sample_blocks, s->sample_blocks * 32); |
| av_log(s->avctx, AV_LOG_DEBUG, "frame size: %i bytes\n", s->frame_size); |
| av_log(s->avctx, AV_LOG_DEBUG, "amode: %i (%i channels)\n", |
| s->amode, dca_channels[s->amode]); |
| av_log(s->avctx, AV_LOG_DEBUG, "sample rate: %i Hz\n", |
| s->sample_rate); |
| av_log(s->avctx, AV_LOG_DEBUG, "bit rate: %i bits/s\n", |
| s->bit_rate); |
| av_log(s->avctx, AV_LOG_DEBUG, "dynrange: %i\n", s->dynrange); |
| av_log(s->avctx, AV_LOG_DEBUG, "timestamp: %i\n", s->timestamp); |
| av_log(s->avctx, AV_LOG_DEBUG, "aux_data: %i\n", s->aux_data); |
| av_log(s->avctx, AV_LOG_DEBUG, "hdcd: %i\n", s->hdcd); |
| av_log(s->avctx, AV_LOG_DEBUG, "ext descr: %i\n", s->ext_descr); |
| av_log(s->avctx, AV_LOG_DEBUG, "ext coding: %i\n", s->ext_coding); |
| av_log(s->avctx, AV_LOG_DEBUG, "aspf: %i\n", s->aspf); |
| av_log(s->avctx, AV_LOG_DEBUG, "lfe: %i\n", s->lfe); |
| av_log(s->avctx, AV_LOG_DEBUG, "predictor history: %i\n", |
| s->predictor_history); |
| av_log(s->avctx, AV_LOG_DEBUG, "header crc: %i\n", s->header_crc); |
| av_log(s->avctx, AV_LOG_DEBUG, "multirate inter: %i\n", |
| s->multirate_inter); |
| av_log(s->avctx, AV_LOG_DEBUG, "version number: %i\n", s->version); |
| av_log(s->avctx, AV_LOG_DEBUG, "copy history: %i\n", s->copy_history); |
| av_log(s->avctx, AV_LOG_DEBUG, |
| "source pcm resolution: %i (%i bits/sample)\n", |
| s->source_pcm_res, dca_bits_per_sample[s->source_pcm_res]); |
| av_log(s->avctx, AV_LOG_DEBUG, "front sum: %i\n", s->front_sum); |
| av_log(s->avctx, AV_LOG_DEBUG, "surround sum: %i\n", s->surround_sum); |
| av_log(s->avctx, AV_LOG_DEBUG, "dialog norm: %i\n", s->dialog_norm); |
| av_log(s->avctx, AV_LOG_DEBUG, "\n"); |
| #endif |
| |
| /* Primary audio coding header */ |
| s->subframes = get_bits(&s->gb, 4) + 1; |
| |
| return dca_parse_audio_coding_header(s, 0, 0); |
| } |
| |
| |
| static inline int get_scale(GetBitContext *gb, int level, int value, int log2range) |
| { |
| if (level < 5) { |
| /* huffman encoded */ |
| value += get_bitalloc(gb, &dca_scalefactor, level); |
| value = av_clip(value, 0, (1 << log2range) - 1); |
| } else if (level < 8) { |
| if (level + 1 > log2range) { |
| skip_bits(gb, level + 1 - log2range); |
| value = get_bits(gb, log2range); |
| } else { |
| value = get_bits(gb, level + 1); |
| } |
| } |
| return value; |
| } |
| |
| static int dca_subframe_header(DCAContext *s, int base_channel, int block_index) |
| { |
| /* Primary audio coding side information */ |
| int j, k; |
| |
| if (get_bits_left(&s->gb) < 0) |
| return AVERROR_INVALIDDATA; |
| |
| if (!base_channel) { |
| s->subsubframes[s->current_subframe] = get_bits(&s->gb, 2) + 1; |
| if (block_index + s->subsubframes[s->current_subframe] > s->sample_blocks/8) { |
| s->subsubframes[s->current_subframe] = 1; |
| return AVERROR_INVALIDDATA; |
| } |
| s->partial_samples[s->current_subframe] = get_bits(&s->gb, 3); |
| } |
| |
| for (j = base_channel; j < s->prim_channels; j++) { |
| for (k = 0; k < s->subband_activity[j]; k++) |
| s->prediction_mode[j][k] = get_bits(&s->gb, 1); |
| } |
| |
| /* Get prediction codebook */ |
| for (j = base_channel; j < s->prim_channels; j++) { |
| for (k = 0; k < s->subband_activity[j]; k++) { |
| if (s->prediction_mode[j][k] > 0) { |
| /* (Prediction coefficient VQ address) */ |
| s->prediction_vq[j][k] = get_bits(&s->gb, 12); |
| } |
| } |
| } |
| |
| /* Bit allocation index */ |
| for (j = base_channel; j < s->prim_channels; j++) { |
| for (k = 0; k < s->vq_start_subband[j]; k++) { |
| if (s->bitalloc_huffman[j] == 6) |
| s->bitalloc[j][k] = get_bits(&s->gb, 5); |
| else if (s->bitalloc_huffman[j] == 5) |
| s->bitalloc[j][k] = get_bits(&s->gb, 4); |
| else if (s->bitalloc_huffman[j] == 7) { |
| av_log(s->avctx, AV_LOG_ERROR, |
| "Invalid bit allocation index\n"); |
| return AVERROR_INVALIDDATA; |
| } else { |
| s->bitalloc[j][k] = |
| get_bitalloc(&s->gb, &dca_bitalloc_index, s->bitalloc_huffman[j]); |
| } |
| |
| if (s->bitalloc[j][k] > 26) { |
| av_dlog(s->avctx, "bitalloc index [%i][%i] too big (%i)\n", |
| j, k, s->bitalloc[j][k]); |
| return AVERROR_INVALIDDATA; |
| } |
| } |
| } |
| |
| /* Transition mode */ |
| for (j = base_channel; j < s->prim_channels; j++) { |
| for (k = 0; k < s->subband_activity[j]; k++) { |
| s->transition_mode[j][k] = 0; |
| if (s->subsubframes[s->current_subframe] > 1 && |
| k < s->vq_start_subband[j] && s->bitalloc[j][k] > 0) { |
| s->transition_mode[j][k] = |
| get_bitalloc(&s->gb, &dca_tmode, s->transient_huffman[j]); |
| } |
| } |
| } |
| |
| if (get_bits_left(&s->gb) < 0) |
| return AVERROR_INVALIDDATA; |
| |
| for (j = base_channel; j < s->prim_channels; j++) { |
| const uint32_t *scale_table; |
| int scale_sum, log_size; |
| |
| memset(s->scale_factor[j], 0, |
| s->subband_activity[j] * sizeof(s->scale_factor[0][0][0]) * 2); |
| |
| if (s->scalefactor_huffman[j] == 6) { |
| scale_table = scale_factor_quant7; |
| log_size = 7; |
| } else { |
| scale_table = scale_factor_quant6; |
| log_size = 6; |
| } |
| |
| /* When huffman coded, only the difference is encoded */ |
| scale_sum = 0; |
| |
| for (k = 0; k < s->subband_activity[j]; k++) { |
| if (k >= s->vq_start_subband[j] || s->bitalloc[j][k] > 0) { |
| scale_sum = get_scale(&s->gb, s->scalefactor_huffman[j], scale_sum, log_size); |
| s->scale_factor[j][k][0] = scale_table[scale_sum]; |
| } |
| |
| if (k < s->vq_start_subband[j] && s->transition_mode[j][k]) { |
| /* Get second scale factor */ |
| scale_sum = get_scale(&s->gb, s->scalefactor_huffman[j], scale_sum, log_size); |
| s->scale_factor[j][k][1] = scale_table[scale_sum]; |
| } |
| } |
| } |
| |
| /* Joint subband scale factor codebook select */ |
| for (j = base_channel; j < s->prim_channels; j++) { |
| /* Transmitted only if joint subband coding enabled */ |
| if (s->joint_intensity[j] > 0) |
| s->joint_huff[j] = get_bits(&s->gb, 3); |
| } |
| |
| if (get_bits_left(&s->gb) < 0) |
| return AVERROR_INVALIDDATA; |
| |
| /* Scale factors for joint subband coding */ |
| for (j = base_channel; j < s->prim_channels; j++) { |
| int source_channel; |
| |
| /* Transmitted only if joint subband coding enabled */ |
| if (s->joint_intensity[j] > 0) { |
| int scale = 0; |
| source_channel = s->joint_intensity[j] - 1; |
| |
| /* When huffman coded, only the difference is encoded |
| * (is this valid as well for joint scales ???) */ |
| |
| for (k = s->subband_activity[j]; k < s->subband_activity[source_channel]; k++) { |
| scale = get_scale(&s->gb, s->joint_huff[j], 64 /* bias */, 7); |
| s->joint_scale_factor[j][k] = scale; /*joint_scale_table[scale]; */ |
| } |
| |
| if (!(s->debug_flag & 0x02)) { |
| av_log(s->avctx, AV_LOG_DEBUG, |
| "Joint stereo coding not supported\n"); |
| s->debug_flag |= 0x02; |
| } |
| } |
| } |
| |
| /* Dynamic range coefficient */ |
| if (!base_channel && s->dynrange) |
| s->dynrange_coef = get_bits(&s->gb, 8); |
| |
| /* Side information CRC check word */ |
| if (s->crc_present) { |
| get_bits(&s->gb, 16); |
| } |
| |
| /* |
| * Primary audio data arrays |
| */ |
| |
| /* VQ encoded high frequency subbands */ |
| for (j = base_channel; j < s->prim_channels; j++) |
| for (k = s->vq_start_subband[j]; k < s->subband_activity[j]; k++) |
| /* 1 vector -> 32 samples */ |
| s->high_freq_vq[j][k] = get_bits(&s->gb, 10); |
| |
| /* Low frequency effect data */ |
| if (!base_channel && s->lfe) { |
| int quant7; |
| /* LFE samples */ |
| int lfe_samples = 2 * s->lfe * (4 + block_index); |
| int lfe_end_sample = 2 * s->lfe * (4 + block_index + s->subsubframes[s->current_subframe]); |
| float lfe_scale; |
| |
| for (j = lfe_samples; j < lfe_end_sample; j++) { |
| /* Signed 8 bits int */ |
| s->lfe_data[j] = get_sbits(&s->gb, 8); |
| } |
| |
| /* Scale factor index */ |
| quant7 = get_bits(&s->gb, 8); |
| if (quant7 > 127) { |
| avpriv_request_sample(s->avctx, "LFEScaleIndex larger than 127"); |
| return AVERROR_INVALIDDATA; |
| } |
| s->lfe_scale_factor = scale_factor_quant7[quant7]; |
| |
| /* Quantization step size * scale factor */ |
| lfe_scale = 0.035 * s->lfe_scale_factor; |
| |
| for (j = lfe_samples; j < lfe_end_sample; j++) |
| s->lfe_data[j] *= lfe_scale; |
| } |
| |
| #ifdef TRACE |
| av_log(s->avctx, AV_LOG_DEBUG, "subsubframes: %i\n", |
| s->subsubframes[s->current_subframe]); |
| av_log(s->avctx, AV_LOG_DEBUG, "partial samples: %i\n", |
| s->partial_samples[s->current_subframe]); |
| |
| for (j = base_channel; j < s->prim_channels; j++) { |
| av_log(s->avctx, AV_LOG_DEBUG, "prediction mode:"); |
| for (k = 0; k < s->subband_activity[j]; k++) |
| av_log(s->avctx, AV_LOG_DEBUG, " %i", s->prediction_mode[j][k]); |
| av_log(s->avctx, AV_LOG_DEBUG, "\n"); |
| } |
| for (j = base_channel; j < s->prim_channels; j++) { |
| for (k = 0; k < s->subband_activity[j]; k++) |
| av_log(s->avctx, AV_LOG_DEBUG, |
| "prediction coefs: %f, %f, %f, %f\n", |
| (float) adpcm_vb[s->prediction_vq[j][k]][0] / 8192, |
| (float) adpcm_vb[s->prediction_vq[j][k]][1] / 8192, |
| (float) adpcm_vb[s->prediction_vq[j][k]][2] / 8192, |
| (float) adpcm_vb[s->prediction_vq[j][k]][3] / 8192); |
| } |
| for (j = base_channel; j < s->prim_channels; j++) { |
| av_log(s->avctx, AV_LOG_DEBUG, "bitalloc index: "); |
| for (k = 0; k < s->vq_start_subband[j]; k++) |
| av_log(s->avctx, AV_LOG_DEBUG, "%2.2i ", s->bitalloc[j][k]); |
| av_log(s->avctx, AV_LOG_DEBUG, "\n"); |
| } |
| for (j = base_channel; j < s->prim_channels; j++) { |
| av_log(s->avctx, AV_LOG_DEBUG, "Transition mode:"); |
| for (k = 0; k < s->subband_activity[j]; k++) |
| av_log(s->avctx, AV_LOG_DEBUG, " %i", s->transition_mode[j][k]); |
| av_log(s->avctx, AV_LOG_DEBUG, "\n"); |
| } |
| for (j = base_channel; j < s->prim_channels; j++) { |
| av_log(s->avctx, AV_LOG_DEBUG, "Scale factor:"); |
| for (k = 0; k < s->subband_activity[j]; k++) { |
| if (k >= s->vq_start_subband[j] || s->bitalloc[j][k] > 0) |
| av_log(s->avctx, AV_LOG_DEBUG, " %i", s->scale_factor[j][k][0]); |
| if (k < s->vq_start_subband[j] && s->transition_mode[j][k]) |
| av_log(s->avctx, AV_LOG_DEBUG, " %i(t)", s->scale_factor[j][k][1]); |
| } |
| av_log(s->avctx, AV_LOG_DEBUG, "\n"); |
| } |
| for (j = base_channel; j < s->prim_channels; j++) { |
| if (s->joint_intensity[j] > 0) { |
| int source_channel = s->joint_intensity[j] - 1; |
| av_log(s->avctx, AV_LOG_DEBUG, "Joint scale factor index:\n"); |
| for (k = s->subband_activity[j]; k < s->subband_activity[source_channel]; k++) |
| av_log(s->avctx, AV_LOG_DEBUG, " %i", s->joint_scale_factor[j][k]); |
| av_log(s->avctx, AV_LOG_DEBUG, "\n"); |
| } |
| } |
| for (j = base_channel; j < s->prim_channels; j++) |
| for (k = s->vq_start_subband[j]; k < s->subband_activity[j]; k++) |
| av_log(s->avctx, AV_LOG_DEBUG, "VQ index: %i\n", s->high_freq_vq[j][k]); |
| if (!base_channel && s->lfe) { |
| int lfe_samples = 2 * s->lfe * (4 + block_index); |
| int lfe_end_sample = 2 * s->lfe * (4 + block_index + s->subsubframes[s->current_subframe]); |
| |
| av_log(s->avctx, AV_LOG_DEBUG, "LFE samples:\n"); |
| for (j = lfe_samples; j < lfe_end_sample; j++) |
| av_log(s->avctx, AV_LOG_DEBUG, " %f", s->lfe_data[j]); |
| av_log(s->avctx, AV_LOG_DEBUG, "\n"); |
| } |
| #endif |
| |
| return 0; |
| } |
| |
| static void qmf_32_subbands(DCAContext *s, int chans, |
| float samples_in[32][8], float *samples_out, |
| float scale) |
| { |
| const float *prCoeff; |
| |
| int sb_act = s->subband_activity[chans]; |
| |
| scale *= sqrt(1 / 8.0); |
| |
| /* Select filter */ |
| if (!s->multirate_inter) /* Non-perfect reconstruction */ |
| prCoeff = fir_32bands_nonperfect; |
| else /* Perfect reconstruction */ |
| prCoeff = fir_32bands_perfect; |
| |
| s->dcadsp.qmf_32_subbands(samples_in, sb_act, &s->synth, &s->imdct, |
| s->subband_fir_hist[chans], |
| &s->hist_index[chans], |
| s->subband_fir_noidea[chans], prCoeff, |
| samples_out, s->raXin, scale); |
| } |
| |
| static void lfe_interpolation_fir(DCAContext *s, int decimation_select, |
| int num_deci_sample, float *samples_in, |
| float *samples_out) |
| { |
| /* samples_in: An array holding decimated samples. |
| * Samples in current subframe starts from samples_in[0], |
| * while samples_in[-1], samples_in[-2], ..., stores samples |
| * from last subframe as history. |
| * |
| * samples_out: An array holding interpolated samples |
| */ |
| |
| int idx; |
| const float *prCoeff; |
| int deciindex; |
| |
| /* Select decimation filter */ |
| if (decimation_select == 1) { |
| idx = 1; |
| prCoeff = lfe_fir_128; |
| } else { |
| idx = 0; |
| prCoeff = lfe_fir_64; |
| } |
| /* Interpolation */ |
| for (deciindex = 0; deciindex < num_deci_sample; deciindex++) { |
| s->dcadsp.lfe_fir[idx](samples_out, samples_in, prCoeff); |
| samples_in++; |
| samples_out += 2 * 32 * (1 + idx); |
| } |
| } |
| |
| /* downmixing routines */ |
| #define MIX_REAR1(samples, s1, rs, coef) \ |
| samples[0][i] += samples[s1][i] * coef[rs][0]; \ |
| samples[1][i] += samples[s1][i] * coef[rs][1]; |
| |
| #define MIX_REAR2(samples, s1, s2, rs, coef) \ |
| samples[0][i] += samples[s1][i] * coef[rs][0] + samples[s2][i] * coef[rs + 1][0]; \ |
| samples[1][i] += samples[s1][i] * coef[rs][1] + samples[s2][i] * coef[rs + 1][1]; |
| |
| #define MIX_FRONT3(samples, coef) \ |
| t = samples[c][i]; \ |
| u = samples[l][i]; \ |
| v = samples[r][i]; \ |
| samples[0][i] = t * coef[0][0] + u * coef[1][0] + v * coef[2][0]; \ |
| samples[1][i] = t * coef[0][1] + u * coef[1][1] + v * coef[2][1]; |
| |
| #define DOWNMIX_TO_STEREO(op1, op2) \ |
| for (i = 0; i < 256; i++) { \ |
| op1 \ |
| op2 \ |
| } |
| |
| static void dca_downmix(float **samples, int srcfmt, int lfe_present, |
| float coef[DCA_PRIM_CHANNELS_MAX + 1][2], |
| const int8_t *channel_mapping) |
| { |
| int c, l, r, sl, sr, s; |
| int i; |
| float t, u, v; |
| |
| switch (srcfmt) { |
| case DCA_MONO: |
| case DCA_4F2R: |
| av_log(NULL, AV_LOG_ERROR, "Not implemented!\n"); |
| break; |
| case DCA_CHANNEL: |
| case DCA_STEREO: |
| case DCA_STEREO_TOTAL: |
| case DCA_STEREO_SUMDIFF: |
| break; |
| case DCA_3F: |
| c = channel_mapping[0]; |
| l = channel_mapping[1]; |
| r = channel_mapping[2]; |
| DOWNMIX_TO_STEREO(MIX_FRONT3(samples, coef), ); |
| break; |
| case DCA_2F1R: |
| s = channel_mapping[2]; |
| DOWNMIX_TO_STEREO(MIX_REAR1(samples, s, 2, coef), ); |
| break; |
| case DCA_3F1R: |
| c = channel_mapping[0]; |
| l = channel_mapping[1]; |
| r = channel_mapping[2]; |
| s = channel_mapping[3]; |
| DOWNMIX_TO_STEREO(MIX_FRONT3(samples, coef), |
| MIX_REAR1(samples, s, 3, coef)); |
| break; |
| case DCA_2F2R: |
| sl = channel_mapping[2]; |
| sr = channel_mapping[3]; |
| DOWNMIX_TO_STEREO(MIX_REAR2(samples, sl, sr, 2, coef), ); |
| break; |
| case DCA_3F2R: |
| c = channel_mapping[0]; |
| l = channel_mapping[1]; |
| r = channel_mapping[2]; |
| sl = channel_mapping[3]; |
| sr = channel_mapping[4]; |
| DOWNMIX_TO_STEREO(MIX_FRONT3(samples, coef), |
| MIX_REAR2(samples, sl, sr, 3, coef)); |
| break; |
| } |
| if (lfe_present) { |
| int lf_buf = dca_lfe_index[srcfmt]; |
| int lf_idx = dca_channels [srcfmt]; |
| for (i = 0; i < 256; i++) { |
| samples[0][i] += samples[lf_buf][i] * coef[lf_idx][0]; |
| samples[1][i] += samples[lf_buf][i] * coef[lf_idx][1]; |
| } |
| } |
| } |
| |
| |
| #ifndef decode_blockcodes |
| /* Very compact version of the block code decoder that does not use table |
| * look-up but is slightly slower */ |
| static int decode_blockcode(int code, int levels, int32_t *values) |
| { |
| int i; |
| int offset = (levels - 1) >> 1; |
| |
| for (i = 0; i < 4; i++) { |
| int div = FASTDIV(code, levels); |
| values[i] = code - offset - div * levels; |
| code = div; |
| } |
| |
| return code; |
| } |
| |
| static int decode_blockcodes(int code1, int code2, int levels, int32_t *values) |
| { |
| return decode_blockcode(code1, levels, values) | |
| decode_blockcode(code2, levels, values + 4); |
| } |
| #endif |
| |
| static const uint8_t abits_sizes[7] = { 7, 10, 12, 13, 15, 17, 19 }; |
| static const uint8_t abits_levels[7] = { 3, 5, 7, 9, 13, 17, 25 }; |
| |
| static int dca_subsubframe(DCAContext *s, int base_channel, int block_index) |
| { |
| int k, l; |
| int subsubframe = s->current_subsubframe; |
| |
| const float *quant_step_table; |
| |
| /* FIXME */ |
| float (*subband_samples)[DCA_SUBBANDS][8] = s->subband_samples[block_index]; |
| LOCAL_ALIGNED_16(int32_t, block, [8 * DCA_SUBBANDS]); |
| |
| /* |
| * Audio data |
| */ |
| |
| /* Select quantization step size table */ |
| if (s->bit_rate_index == 0x1f) |
| quant_step_table = lossless_quant_d; |
| else |
| quant_step_table = lossy_quant_d; |
| |
| for (k = base_channel; k < s->prim_channels; k++) { |
| float rscale[DCA_SUBBANDS]; |
| |
| if (get_bits_left(&s->gb) < 0) |
| return AVERROR_INVALIDDATA; |
| |
| for (l = 0; l < s->vq_start_subband[k]; l++) { |
| int m; |
| |
| /* Select the mid-tread linear quantizer */ |
| int abits = s->bitalloc[k][l]; |
| |
| float quant_step_size = quant_step_table[abits]; |
| |
| /* |
| * Determine quantization index code book and its type |
| */ |
| |
| /* Select quantization index code book */ |
| int sel = s->quant_index_huffman[k][abits]; |
| |
| /* |
| * Extract bits from the bit stream |
| */ |
| if (!abits) { |
| rscale[l] = 0; |
| memset(block + 8 * l, 0, 8 * sizeof(block[0])); |
| } else { |
| /* Deal with transients */ |
| int sfi = s->transition_mode[k][l] && subsubframe >= s->transition_mode[k][l]; |
| rscale[l] = quant_step_size * s->scale_factor[k][l][sfi] * |
| s->scalefactor_adj[k][sel]; |
| |
| if (abits >= 11 || !dca_smpl_bitalloc[abits].vlc[sel].table) { |
| if (abits <= 7) { |
| /* Block code */ |
| int block_code1, block_code2, size, levels, err; |
| |
| size = abits_sizes[abits - 1]; |
| levels = abits_levels[abits - 1]; |
| |
| block_code1 = get_bits(&s->gb, size); |
| block_code2 = get_bits(&s->gb, size); |
| err = decode_blockcodes(block_code1, block_code2, |
| levels, block + 8 * l); |
| if (err) { |
| av_log(s->avctx, AV_LOG_ERROR, |
| "ERROR: block code look-up failed\n"); |
| return AVERROR_INVALIDDATA; |
| } |
| } else { |
| /* no coding */ |
| for (m = 0; m < 8; m++) |
| block[8 * l + m] = get_sbits(&s->gb, abits - 3); |
| } |
| } else { |
| /* Huffman coded */ |
| for (m = 0; m < 8; m++) |
| block[8 * l + m] = get_bitalloc(&s->gb, |
| &dca_smpl_bitalloc[abits], sel); |
| } |
| |
| } |
| } |
| |
| s->fmt_conv.int32_to_float_fmul_array8(&s->fmt_conv, subband_samples[k][0], |
| block, rscale, 8 * s->vq_start_subband[k]); |
| |
| for (l = 0; l < s->vq_start_subband[k]; l++) { |
| int m; |
| /* |
| * Inverse ADPCM if in prediction mode |
| */ |
| if (s->prediction_mode[k][l]) { |
| int n; |
| if (s->predictor_history) |
| subband_samples[k][l][0] += (adpcm_vb[s->prediction_vq[k][l]][0] * |
| s->subband_samples_hist[k][l][3] + |
| adpcm_vb[s->prediction_vq[k][l]][1] * |
| s->subband_samples_hist[k][l][2] + |
| adpcm_vb[s->prediction_vq[k][l]][2] * |
| s->subband_samples_hist[k][l][1] + |
| adpcm_vb[s->prediction_vq[k][l]][3] * |
| s->subband_samples_hist[k][l][0]) * |
| (1.0f / 8192); |
| for (m = 1; m < 8; m++) { |
| float sum = adpcm_vb[s->prediction_vq[k][l]][0] * |
| subband_samples[k][l][m - 1]; |
| for (n = 2; n <= 4; n++) |
| if (m >= n) |
| sum += adpcm_vb[s->prediction_vq[k][l]][n - 1] * |
| subband_samples[k][l][m - n]; |
| else if (s->predictor_history) |
| sum += adpcm_vb[s->prediction_vq[k][l]][n - 1] * |
| s->subband_samples_hist[k][l][m - n + 4]; |
| subband_samples[k][l][m] += sum * (1.0f / 8192); |
| } |
| } |
| } |
| |
| /* |
| * Decode VQ encoded high frequencies |
| */ |
| if (s->subband_activity[k] > s->vq_start_subband[k]) { |
| if (!(s->debug_flag & 0x01)) { |
| av_log(s->avctx, AV_LOG_DEBUG, |
| "Stream with high frequencies VQ coding\n"); |
| s->debug_flag |= 0x01; |
| } |
| s->dcadsp.decode_hf(subband_samples[k], s->high_freq_vq[k], |
| high_freq_vq, subsubframe * 8, |
| s->scale_factor[k], s->vq_start_subband[k], |
| s->subband_activity[k]); |
| } |
| } |
| |
| /* Check for DSYNC after subsubframe */ |
| if (s->aspf || subsubframe == s->subsubframes[s->current_subframe] - 1) { |
| if (0xFFFF == get_bits(&s->gb, 16)) { /* 0xFFFF */ |
| #ifdef TRACE |
| av_log(s->avctx, AV_LOG_DEBUG, "Got subframe DSYNC\n"); |
| #endif |
| } else { |
| av_log(s->avctx, AV_LOG_ERROR, "Didn't get subframe DSYNC\n"); |
| return AVERROR_INVALIDDATA; |
| } |
| } |
| |
| /* Backup predictor history for adpcm */ |
| for (k = base_channel; k < s->prim_channels; k++) |
| for (l = 0; l < s->vq_start_subband[k]; l++) |
| AV_COPY128(s->subband_samples_hist[k][l], &subband_samples[k][l][4]); |
| |
| return 0; |
| } |
| |
| static int dca_filter_channels(DCAContext *s, int block_index) |
| { |
| float (*subband_samples)[DCA_SUBBANDS][8] = s->subband_samples[block_index]; |
| int k; |
| |
| /* 32 subbands QMF */ |
| for (k = 0; k < s->prim_channels; k++) { |
| /* static float pcm_to_double[8] = { 32768.0, 32768.0, 524288.0, 524288.0, |
| 0, 8388608.0, 8388608.0 };*/ |
| if (s->channel_order_tab[k] >= 0) |
| qmf_32_subbands(s, k, subband_samples[k], |
| s->samples_chanptr[s->channel_order_tab[k]], |
| M_SQRT1_2 / 32768.0 /* pcm_to_double[s->source_pcm_res] */); |
| } |
| |
| /* Generate LFE samples for this subsubframe FIXME!!! */ |
| if (s->lfe) { |
| lfe_interpolation_fir(s, s->lfe, 2 * s->lfe, |
| s->lfe_data + 2 * s->lfe * (block_index + 4), |
| s->samples_chanptr[s->lfe_index]); |
| /* Outputs 20bits pcm samples */ |
| } |
| |
| /* Downmixing to Stereo */ |
| if (s->prim_channels + !!s->lfe > 2 && |
| s->avctx->request_channel_layout == AV_CH_LAYOUT_STEREO) { |
| dca_downmix(s->samples_chanptr, s->amode, !!s->lfe, s->downmix_coef, |
| s->channel_order_tab); |
| } |
| |
| return 0; |
| } |
| |
| |
| static int dca_subframe_footer(DCAContext *s, int base_channel) |
| { |
| int in, out, aux_data_count, aux_data_end, reserved; |
| uint32_t nsyncaux; |
| |
| /* |
| * Unpack optional information |
| */ |
| |
| /* presumably optional information only appears in the core? */ |
| if (!base_channel) { |
| if (s->timestamp) |
| skip_bits_long(&s->gb, 32); |
| |
| if (s->aux_data) { |
| aux_data_count = get_bits(&s->gb, 6); |
| |
| // align (32-bit) |
| skip_bits_long(&s->gb, (-get_bits_count(&s->gb)) & 31); |
| |
| aux_data_end = 8 * aux_data_count + get_bits_count(&s->gb); |
| |
| if ((nsyncaux = get_bits_long(&s->gb, 32)) != DCA_NSYNCAUX) { |
| av_log(s->avctx, AV_LOG_ERROR, "nSYNCAUX mismatch %#"PRIx32"\n", |
| nsyncaux); |
| return AVERROR_INVALIDDATA; |
| } |
| |
| if (get_bits1(&s->gb)) { // bAUXTimeStampFlag |
| avpriv_request_sample(s->avctx, |
| "Auxiliary Decode Time Stamp Flag"); |
| // align (4-bit) |
| skip_bits(&s->gb, (-get_bits_count(&s->gb)) & 4); |
| // 44 bits: nMSByte (8), nMarker (4), nLSByte (28), nMarker (4) |
| skip_bits_long(&s->gb, 44); |
| } |
| |
| if ((s->core_downmix = get_bits1(&s->gb))) { |
| int am = get_bits(&s->gb, 3); |
| switch (am) { |
| case 0: |
| s->core_downmix_amode = DCA_MONO; |
| break; |
| case 1: |
| s->core_downmix_amode = DCA_STEREO; |
| break; |
| case 2: |
| s->core_downmix_amode = DCA_STEREO_TOTAL; |
| break; |
| case 3: |
| s->core_downmix_amode = DCA_3F; |
| break; |
| case 4: |
| s->core_downmix_amode = DCA_2F1R; |
| break; |
| case 5: |
| s->core_downmix_amode = DCA_2F2R; |
| break; |
| case 6: |
| s->core_downmix_amode = DCA_3F1R; |
| break; |
| default: |
| av_log(s->avctx, AV_LOG_ERROR, |
| "Invalid mode %d for embedded downmix coefficients\n", |
| am); |
| return AVERROR_INVALIDDATA; |
| } |
| for (out = 0; out < dca_channels[s->core_downmix_amode]; out++) { |
| for (in = 0; in < s->prim_channels + !!s->lfe; in++) { |
| uint16_t tmp = get_bits(&s->gb, 9); |
| if ((tmp & 0xFF) > 241) { |
| av_log(s->avctx, AV_LOG_ERROR, |
| "Invalid downmix coefficient code %"PRIu16"\n", |
| tmp); |
| return AVERROR_INVALIDDATA; |
| } |
| s->core_downmix_codes[in][out] = tmp; |
| } |
| } |
| } |
| |
| align_get_bits(&s->gb); // byte align |
| skip_bits(&s->gb, 16); // nAUXCRC16 |
| |
| // additional data (reserved, cf. ETSI TS 102 114 V1.4.1) |
| if ((reserved = (aux_data_end - get_bits_count(&s->gb))) < 0) { |
| av_log(s->avctx, AV_LOG_ERROR, |
| "Overread auxiliary data by %d bits\n", -reserved); |
| return AVERROR_INVALIDDATA; |
| } else if (reserved) { |
| avpriv_request_sample(s->avctx, |
| "Core auxiliary data reserved content"); |
| skip_bits_long(&s->gb, reserved); |
| } |
| } |
| |
| if (s->crc_present && s->dynrange) |
| get_bits(&s->gb, 16); |
| } |
| |
| return 0; |
| } |
| |
| /** |
| * Decode a dca frame block |
| * |
| * @param s pointer to the DCAContext |
| */ |
| |
| static int dca_decode_block(DCAContext *s, int base_channel, int block_index) |
| { |
| int ret; |
| |
| /* Sanity check */ |
| if (s->current_subframe >= s->subframes) { |
| av_log(s->avctx, AV_LOG_DEBUG, "check failed: %i>%i", |
| s->current_subframe, s->subframes); |
| return AVERROR_INVALIDDATA; |
| } |
| |
| if (!s->current_subsubframe) { |
| #ifdef TRACE |
| av_log(s->avctx, AV_LOG_DEBUG, "DSYNC dca_subframe_header\n"); |
| #endif |
| /* Read subframe header */ |
| if ((ret = dca_subframe_header(s, base_channel, block_index))) |
| return ret; |
| } |
| |
| /* Read subsubframe */ |
| #ifdef TRACE |
| av_log(s->avctx, AV_LOG_DEBUG, "DSYNC dca_subsubframe\n"); |
| #endif |
| if ((ret = dca_subsubframe(s, base_channel, block_index))) |
| return ret; |
| |
| /* Update state */ |
| s->current_subsubframe++; |
| if (s->current_subsubframe >= s->subsubframes[s->current_subframe]) { |
| s->current_subsubframe = 0; |
| s->current_subframe++; |
| } |
| if (s->current_subframe >= s->subframes) { |
| #ifdef TRACE |
| av_log(s->avctx, AV_LOG_DEBUG, "DSYNC dca_subframe_footer\n"); |
| #endif |
| /* Read subframe footer */ |
| if ((ret = dca_subframe_footer(s, base_channel))) |
| return ret; |
| } |
| |
| return 0; |
| } |
| |
| /** |
| * Return the number of channels in an ExSS speaker mask (HD) |
| */ |
| static int dca_exss_mask2count(int mask) |
| { |
| /* count bits that mean speaker pairs twice */ |
| return av_popcount(mask) + |
| av_popcount(mask & (DCA_EXSS_CENTER_LEFT_RIGHT | |
| DCA_EXSS_FRONT_LEFT_RIGHT | |
| DCA_EXSS_FRONT_HIGH_LEFT_RIGHT | |
| DCA_EXSS_WIDE_LEFT_RIGHT | |
| DCA_EXSS_SIDE_LEFT_RIGHT | |
| DCA_EXSS_SIDE_HIGH_LEFT_RIGHT | |
| DCA_EXSS_SIDE_REAR_LEFT_RIGHT | |
| DCA_EXSS_REAR_LEFT_RIGHT | |
| DCA_EXSS_REAR_HIGH_LEFT_RIGHT)); |
| } |
| |
| /** |
| * Skip mixing coefficients of a single mix out configuration (HD) |
| */ |
| static void dca_exss_skip_mix_coeffs(GetBitContext *gb, int channels, int out_ch) |
| { |
| int i; |
| |
| for (i = 0; i < channels; i++) { |
| int mix_map_mask = get_bits(gb, out_ch); |
| int num_coeffs = av_popcount(mix_map_mask); |
| skip_bits_long(gb, num_coeffs * 6); |
| } |
| } |
| |
| /** |
| * Parse extension substream asset header (HD) |
| */ |
| static int dca_exss_parse_asset_header(DCAContext *s) |
| { |
| int header_pos = get_bits_count(&s->gb); |
| int header_size; |
| int channels = 0; |
| int embedded_stereo = 0; |
| int embedded_6ch = 0; |
| int drc_code_present; |
| int av_uninit(extensions_mask); |
| int i, j; |
| |
| if (get_bits_left(&s->gb) < 16) |
| return -1; |
| |
| /* We will parse just enough to get to the extensions bitmask with which |
| * we can set the profile value. */ |
| |
| header_size = get_bits(&s->gb, 9) + 1; |
| skip_bits(&s->gb, 3); // asset index |
| |
| if (s->static_fields) { |
| if (get_bits1(&s->gb)) |
| skip_bits(&s->gb, 4); // asset type descriptor |
| if (get_bits1(&s->gb)) |
| skip_bits_long(&s->gb, 24); // language descriptor |
| |
| if (get_bits1(&s->gb)) { |
| /* How can one fit 1024 bytes of text here if the maximum value |
| * for the asset header size field above was 512 bytes? */ |
| int text_length = get_bits(&s->gb, 10) + 1; |
| if (get_bits_left(&s->gb) < text_length * 8) |
| return -1; |
| skip_bits_long(&s->gb, text_length * 8); // info text |
| } |
| |
| skip_bits(&s->gb, 5); // bit resolution - 1 |
| skip_bits(&s->gb, 4); // max sample rate code |
| channels = get_bits(&s->gb, 8) + 1; |
| |
| if (get_bits1(&s->gb)) { // 1-to-1 channels to speakers |
| int spkr_remap_sets; |
| int spkr_mask_size = 16; |
| int num_spkrs[7]; |
| |
| if (channels > 2) |
| embedded_stereo = get_bits1(&s->gb); |
| if (channels > 6) |
| embedded_6ch = get_bits1(&s->gb); |
| |
| if (get_bits1(&s->gb)) { |
| spkr_mask_size = (get_bits(&s->gb, 2) + 1) << 2; |
| skip_bits(&s->gb, spkr_mask_size); // spkr activity mask |
| } |
| |
| spkr_remap_sets = get_bits(&s->gb, 3); |
| |
| for (i = 0; i < spkr_remap_sets; i++) { |
| /* std layout mask for each remap set */ |
| num_spkrs[i] = dca_exss_mask2count(get_bits(&s->gb, spkr_mask_size)); |
| } |
| |
| for (i = 0; i < spkr_remap_sets; i++) { |
| int num_dec_ch_remaps = get_bits(&s->gb, 5) + 1; |
| if (get_bits_left(&s->gb) < 0) |
| return -1; |
| |
| for (j = 0; j < num_spkrs[i]; j++) { |
| int remap_dec_ch_mask = get_bits_long(&s->gb, num_dec_ch_remaps); |
| int num_dec_ch = av_popcount(remap_dec_ch_mask); |
| skip_bits_long(&s->gb, num_dec_ch * 5); // remap codes |
| } |
| } |
| |
| } else { |
| skip_bits(&s->gb, 3); // representation type |
| } |
| } |
| |
| drc_code_present = get_bits1(&s->gb); |
| if (drc_code_present) |
| get_bits(&s->gb, 8); // drc code |
| |
| if (get_bits1(&s->gb)) |
| skip_bits(&s->gb, 5); // dialog normalization code |
| |
| if (drc_code_present && embedded_stereo) |
| get_bits(&s->gb, 8); // drc stereo code |
| |
| if (s->mix_metadata && get_bits1(&s->gb)) { |
| skip_bits(&s->gb, 1); // external mix |
| skip_bits(&s->gb, 6); // post mix gain code |
| |
| if (get_bits(&s->gb, 2) != 3) // mixer drc code |
| skip_bits(&s->gb, 3); // drc limit |
| else |
| skip_bits(&s->gb, 8); // custom drc code |
| |
| if (get_bits1(&s->gb)) // channel specific scaling |
| for (i = 0; i < s->num_mix_configs; i++) |
| skip_bits_long(&s->gb, s->mix_config_num_ch[i] * 6); // scale codes |
| else |
| skip_bits_long(&s->gb, s->num_mix_configs * 6); // scale codes |
| |
| for (i = 0; i < s->num_mix_configs; i++) { |
| if (get_bits_left(&s->gb) < 0) |
| return -1; |
| dca_exss_skip_mix_coeffs(&s->gb, channels, s->mix_config_num_ch[i]); |
| if (embedded_6ch) |
| dca_exss_skip_mix_coeffs(&s->gb, 6, s->mix_config_num_ch[i]); |
| if (embedded_stereo) |
| dca_exss_skip_mix_coeffs(&s->gb, 2, s->mix_config_num_ch[i]); |
| } |
| } |
| |
| switch (get_bits(&s->gb, 2)) { |
| case 0: extensions_mask = get_bits(&s->gb, 12); break; |
| case 1: extensions_mask = DCA_EXT_EXSS_XLL; break; |
| case 2: extensions_mask = DCA_EXT_EXSS_LBR; break; |
| case 3: extensions_mask = 0; /* aux coding */ break; |
| } |
| |
| /* not parsed further, we were only interested in the extensions mask */ |
| |
| if (get_bits_left(&s->gb) < 0) |
| return -1; |
| |
| if (get_bits_count(&s->gb) - header_pos > header_size * 8) { |
| av_log(s->avctx, AV_LOG_WARNING, "Asset header size mismatch.\n"); |
| return -1; |
| } |
| skip_bits_long(&s->gb, header_pos + header_size * 8 - get_bits_count(&s->gb)); |
| |
| if (extensions_mask & DCA_EXT_EXSS_XLL) |
| s->profile = FF_PROFILE_DTS_HD_MA; |
| else if (extensions_mask & (DCA_EXT_EXSS_XBR | DCA_EXT_EXSS_X96 | |
| DCA_EXT_EXSS_XXCH)) |
| s->profile = FF_PROFILE_DTS_HD_HRA; |
| |
| if (!(extensions_mask & DCA_EXT_CORE)) |
| av_log(s->avctx, AV_LOG_WARNING, "DTS core detection mismatch.\n"); |
| if ((extensions_mask & DCA_CORE_EXTS) != s->core_ext_mask) |
| av_log(s->avctx, AV_LOG_WARNING, |
| "DTS extensions detection mismatch (%d, %d)\n", |
| extensions_mask & DCA_CORE_EXTS, s->core_ext_mask); |
| |
| return 0; |
| } |
| |
| static int dca_xbr_parse_frame(DCAContext *s) |
| { |
| int scale_table_high[DCA_CHSET_CHANS_MAX][DCA_SUBBANDS][2]; |
| int active_bands[DCA_CHSETS_MAX][DCA_CHSET_CHANS_MAX]; |
| int abits_high[DCA_CHSET_CHANS_MAX][DCA_SUBBANDS]; |
| int anctemp[DCA_CHSET_CHANS_MAX]; |
| int chset_fsize[DCA_CHSETS_MAX]; |
| int n_xbr_ch[DCA_CHSETS_MAX]; |
| int hdr_size, num_chsets, xbr_tmode, hdr_pos; |
| int i, j, k, l, chset, chan_base; |
| |
| av_log(s->avctx, AV_LOG_DEBUG, "DTS-XBR: decoding XBR extension\n"); |
| |
| /* get bit position of sync header */ |
| hdr_pos = get_bits_count(&s->gb) - 32; |
| |
| hdr_size = get_bits(&s->gb, 6) + 1; |
| num_chsets = get_bits(&s->gb, 2) + 1; |
| |
| for(i = 0; i < num_chsets; i++) |
| chset_fsize[i] = get_bits(&s->gb, 14) + 1; |
| |
| xbr_tmode = get_bits1(&s->gb); |
| |
| for(i = 0; i < num_chsets; i++) { |
| n_xbr_ch[i] = get_bits(&s->gb, 3) + 1; |
| k = get_bits(&s->gb, 2) + 5; |
| for(j = 0; j < n_xbr_ch[i]; j++) { |
| active_bands[i][j] = get_bits(&s->gb, k) + 1; |
| if (active_bands[i][j] > DCA_SUBBANDS) { |
| av_log(s->avctx, AV_LOG_ERROR, "too many active subbands (%d)\n", active_bands[i][j]); |
| return AVERROR_INVALIDDATA; |
| } |
| } |
| } |
| |
| /* skip to the end of the header */ |
| i = get_bits_count(&s->gb); |
| if(hdr_pos + hdr_size * 8 > i) |
| skip_bits_long(&s->gb, hdr_pos + hdr_size * 8 - i); |
| |
| /* loop over the channel data sets */ |
| /* only decode as many channels as we've decoded base data for */ |
| for(chset = 0, chan_base = 0; |
| chset < num_chsets && chan_base + n_xbr_ch[chset] <= s->prim_channels; |
| chan_base += n_xbr_ch[chset++]) { |
| int start_posn = get_bits_count(&s->gb); |
| int subsubframe = 0; |
| int subframe = 0; |
| |
| /* loop over subframes */ |
| for (k = 0; k < (s->sample_blocks / 8); k++) { |
| /* parse header if we're on first subsubframe of a block */ |
| if(subsubframe == 0) { |
| /* Parse subframe header */ |
| for(i = 0; i < n_xbr_ch[chset]; i++) { |
| anctemp[i] = get_bits(&s->gb, 2) + 2; |
| } |
| |
| for(i = 0; i < n_xbr_ch[chset]; i++) { |
| get_array(&s->gb, abits_high[i], active_bands[chset][i], anctemp[i]); |
| } |
| |
| for(i = 0; i < n_xbr_ch[chset]; i++) { |
| anctemp[i] = get_bits(&s->gb, 3); |
| if(anctemp[i] < 1) { |
| av_log(s->avctx, AV_LOG_ERROR, "DTS-XBR: SYNC ERROR\n"); |
| return AVERROR_INVALIDDATA; |
| } |
| } |
| |
| /* generate scale factors */ |
| for(i = 0; i < n_xbr_ch[chset]; i++) { |
| const uint32_t *scale_table; |
| int nbits; |
| int scale_table_size; |
| |
| if (s->scalefactor_huffman[chan_base+i] == 6) { |
| scale_table = scale_factor_quant7; |
| scale_table_size = FF_ARRAY_ELEMS(scale_factor_quant7); |
| } else { |
| scale_table = scale_factor_quant6; |
| scale_table_size = FF_ARRAY_ELEMS(scale_factor_quant6); |
| } |
| |
| nbits = anctemp[i]; |
| |
| for(j = 0; j < active_bands[chset][i]; j++) { |
| if(abits_high[i][j] > 0) { |
| int index = get_bits(&s->gb, nbits); |
| if (index >= scale_table_size) { |
| av_log(s->avctx, AV_LOG_ERROR, "scale table index %d invalid\n", index); |
| return AVERROR_INVALIDDATA; |
| } |
| scale_table_high[i][j][0] = scale_table[index]; |
| |
| if(xbr_tmode && s->transition_mode[i][j]) { |
| int index = get_bits(&s->gb, nbits); |
| if (index >= scale_table_size) { |
| av_log(s->avctx, AV_LOG_ERROR, "scale table index %d invalid\n", index); |
| return AVERROR_INVALIDDATA; |
| } |
| scale_table_high[i][j][1] = scale_table[index]; |
| } |
| } |
| } |
| } |
| } |
| |
| /* decode audio array for this block */ |
| for(i = 0; i < n_xbr_ch[chset]; i++) { |
| for(j = 0; j < active_bands[chset][i]; j++) { |
| const int xbr_abits = abits_high[i][j]; |
| const float quant_step_size = lossless_quant_d[xbr_abits]; |
| const int sfi = xbr_tmode && s->transition_mode[i][j] && subsubframe >= s->transition_mode[i][j]; |
| const float rscale = quant_step_size * scale_table_high[i][j][sfi]; |
| float *subband_samples = s->subband_samples[k][chan_base+i][j]; |
| int block[8]; |
| |
| if(xbr_abits <= 0) |
| continue; |
| |
| if(xbr_abits > 7) { |
| get_array(&s->gb, block, 8, xbr_abits - 3); |
| } else { |
| int block_code1, block_code2, size, levels, err; |
| |
| size = abits_sizes[xbr_abits - 1]; |
| levels = abits_levels[xbr_abits - 1]; |
| |
| block_code1 = get_bits(&s->gb, size); |
| block_code2 = get_bits(&s->gb, size); |
| err = decode_blockcodes(block_code1, block_code2, |
| levels, block); |
| if (err) { |
| av_log(s->avctx, AV_LOG_ERROR, |
| "ERROR: DTS-XBR: block code look-up failed\n"); |
| return AVERROR_INVALIDDATA; |
| } |
| } |
| |
| /* scale & sum into subband */ |
| for(l = 0; l < 8; l++) |
| subband_samples[l] += (float)block[l] * rscale; |
| } |
| } |
| |
| /* check DSYNC marker */ |
| if(s->aspf || subsubframe == s->subsubframes[subframe] - 1) { |
| if(get_bits(&s->gb, 16) != 0xffff) { |
| av_log(s->avctx, AV_LOG_ERROR, "DTS-XBR: Didn't get subframe DSYNC\n"); |
| return AVERROR_INVALIDDATA; |
| } |
| } |
| |
| /* advance sub-sub-frame index */ |
| if(++subsubframe >= s->subsubframes[subframe]) { |
| subsubframe = 0; |
| subframe++; |
| } |
| } |
| |
| /* skip to next channel set */ |
| i = get_bits_count(&s->gb); |
| if(start_posn + chset_fsize[chset] * 8 != i) { |
| j = start_posn + chset_fsize[chset] * 8 - i; |
| if(j < 0 || j >= 8) |
| av_log(s->avctx, AV_LOG_ERROR, "DTS-XBR: end of channel set," |
| " skipping further than expected (%d bits)\n", j); |
| skip_bits_long(&s->gb, j); |
| } |
| } |
| |
| return 0; |
| } |
| |
| /* parse initial header for XXCH and dump details */ |
| static int dca_xxch_decode_frame(DCAContext *s) |
| { |
| int hdr_size, spkmsk_bits, num_chsets, core_spk, hdr_pos; |
| int i, chset, base_channel, chstart, fsize[8]; |
| |
| /* assume header word has already been parsed */ |
| hdr_pos = get_bits_count(&s->gb) - 32; |
| hdr_size = get_bits(&s->gb, 6) + 1; |
| /*chhdr_crc =*/ skip_bits1(&s->gb); |
| spkmsk_bits = get_bits(&s->gb, 5) + 1; |
| num_chsets = get_bits(&s->gb, 2) + 1; |
| |
| for (i = 0; i < num_chsets; i++) |
| fsize[i] = get_bits(&s->gb, 14) + 1; |
| |
| core_spk = get_bits(&s->gb, spkmsk_bits); |
| s->xxch_core_spkmask = core_spk; |
| s->xxch_nbits_spk_mask = spkmsk_bits; |
| s->xxch_dmix_embedded = 0; |
| |
| /* skip to the end of the header */ |
| i = get_bits_count(&s->gb); |
| if (hdr_pos + hdr_size * 8 > i) |
| skip_bits_long(&s->gb, hdr_pos + hdr_size * 8 - i); |
| |
| for (chset = 0; chset < num_chsets; chset++) { |
| chstart = get_bits_count(&s->gb); |
| base_channel = s->prim_channels; |
| s->xxch_chset = chset; |
| |
| /* XXCH and Core headers differ, see 6.4.2 "XXCH Channel Set Header" vs. |
| 5.3.2 "Primary Audio Coding Header", DTS Spec 1.3.1 */ |
| dca_parse_audio_coding_header(s, base_channel, 1); |
| |
| /* decode channel data */ |
| for (i = 0; i < (s->sample_blocks / 8); i++) { |
| if (dca_decode_block(s, base_channel, i)) { |
| av_log(s->avctx, AV_LOG_ERROR, |
| "Error decoding DTS-XXCH extension\n"); |
| continue; |
| } |
| } |
| |
| /* skip to end of this section */ |
| i = get_bits_count(&s->gb); |
| if (chstart + fsize[chset] * 8 > i) |
| skip_bits_long(&s->gb, chstart + fsize[chset] * 8 - i); |
| } |
| s->xxch_chset = num_chsets; |
| |
| return 0; |
| } |
| |
| /** |
| * Parse extension substream header (HD) |
| */ |
| static void dca_exss_parse_header(DCAContext *s) |
| { |
| int asset_size[8]; |
| int ss_index; |
| int blownup; |
| int num_audiop = 1; |
| int num_assets = 1; |
| int active_ss_mask[8]; |
| int i, j; |
| int start_posn; |
| int hdrsize; |
| uint32_t mkr; |
| |
| if (get_bits_left(&s->gb) < 52) |
| return; |
| |
| start_posn = get_bits_count(&s->gb) - 32; |
| |
| skip_bits(&s->gb, 8); // user data |
| ss_index = get_bits(&s->gb, 2); |
| |
| blownup = get_bits1(&s->gb); |
| hdrsize = get_bits(&s->gb, 8 + 4 * blownup) + 1; // header_size |
| skip_bits(&s->gb, 16 + 4 * blownup); // hd_size |
| |
| s->static_fields = get_bits1(&s->gb); |
| if (s->static_fields) { |
| skip_bits(&s->gb, 2); // reference clock code |
| skip_bits(&s->gb, 3); // frame duration code |
| |
| if (get_bits1(&s->gb)) |
| skip_bits_long(&s->gb, 36); // timestamp |
| |
| /* a single stream can contain multiple audio assets that can be |
| * combined to form multiple audio presentations */ |
| |
| num_audiop = get_bits(&s->gb, 3) + 1; |
| if (num_audiop > 1) { |
| avpriv_request_sample(s->avctx, |
| "Multiple DTS-HD audio presentations"); |
| /* ignore such streams for now */ |
| return; |
| } |
| |
| num_assets = get_bits(&s->gb, 3) + 1; |
| if (num_assets > 1) { |
| avpriv_request_sample(s->avctx, "Multiple DTS-HD audio assets"); |
| /* ignore such streams for now */ |
| return; |
| } |
| |
| for (i = 0; i < num_audiop; i++) |
| active_ss_mask[i] = get_bits(&s->gb, ss_index + 1); |
| |
| for (i = 0; i < num_audiop; i++) |
| for (j = 0; j <= ss_index; j++) |
| if (active_ss_mask[i] & (1 << j)) |
| skip_bits(&s->gb, 8); // active asset mask |
| |
| s->mix_metadata = get_bits1(&s->gb); |
| if (s->mix_metadata) { |
| int mix_out_mask_size; |
| |
| skip_bits(&s->gb, 2); // adjustment level |
| mix_out_mask_size = (get_bits(&s->gb, 2) + 1) << 2; |
| s->num_mix_configs = get_bits(&s->gb, 2) + 1; |
| |
| for (i = 0; i < s->num_mix_configs; i++) { |
| int mix_out_mask = get_bits(&s->gb, mix_out_mask_size); |
| s->mix_config_num_ch[i] = dca_exss_mask2count(mix_out_mask); |
| } |
| } |
| } |
| |
| for (i = 0; i < num_assets; i++) |
| asset_size[i] = get_bits_long(&s->gb, 16 + 4 * blownup); |
| |
| for (i = 0; i < num_assets; i++) { |
| if (dca_exss_parse_asset_header(s)) |
| return; |
| } |
| |
| /* not parsed further, we were only interested in the extensions mask |
| * from the asset header */ |
| |
| if (num_assets > 0) { |
| j = get_bits_count(&s->gb); |
| if (start_posn + hdrsize * 8 > j) |
| skip_bits_long(&s->gb, start_posn + hdrsize * 8 - j); |
| |
| for (i = 0; i < num_assets; i++) { |
| start_posn = get_bits_count(&s->gb); |
| mkr = get_bits_long(&s->gb, 32); |
| |
| /* parse extensions that we know about */ |
| if (mkr == 0x655e315e) { |
| dca_xbr_parse_frame(s); |
| } else if (mkr == 0x47004a03) { |
| dca_xxch_decode_frame(s); |
| s->core_ext_mask |= DCA_EXT_XXCH; /* xxx use for chan reordering */ |
| } else { |
| av_log(s->avctx, AV_LOG_DEBUG, |
| "DTS-ExSS: unknown marker = 0x%08x\n", mkr); |
| } |
| |
| /* skip to end of block */ |
| j = get_bits_count(&s->gb); |
| if (start_posn + asset_size[i] * 8 > j) |
| skip_bits_long(&s->gb, start_posn + asset_size[i] * 8 - j); |
| } |
| } |
| } |
| |
| /** |
| * Main frame decoding function |
| * FIXME add arguments |
| */ |
| static int dca_decode_frame(AVCodecContext *avctx, void *data, |
| int *got_frame_ptr, AVPacket *avpkt) |
| { |
| AVFrame *frame = data; |
| const uint8_t *buf = avpkt->data; |
| int buf_size = avpkt->size; |
| int channel_mask; |
| int channel_layout; |
| int lfe_samples; |
| int num_core_channels = 0; |
| int i, ret; |
| float **samples_flt; |
| float *src_chan; |
| float *dst_chan; |
| DCAContext *s = avctx->priv_data; |
| int core_ss_end; |
| int channels, full_channels; |
| float scale; |
| int achan; |
| int chset; |
| int mask; |
| int lavc; |
| int posn; |
| int j, k; |
| int endch; |
| |
| s->xch_present = 0; |
| |
| s->dca_buffer_size = ff_dca_convert_bitstream(buf, buf_size, s->dca_buffer, |
| DCA_MAX_FRAME_SIZE + DCA_MAX_EXSS_HEADER_SIZE); |
| if (s->dca_buffer_size == AVERROR_INVALIDDATA) { |
| av_log(avctx, AV_LOG_ERROR, "Not a valid DCA frame\n"); |
| return AVERROR_INVALIDDATA; |
| } |
| |
| init_get_bits(&s->gb, s->dca_buffer, s->dca_buffer_size * 8); |
| if ((ret = dca_parse_frame_header(s)) < 0) { |
| //seems like the frame is corrupt, try with the next one |
| return ret; |
| } |
| //set AVCodec values with parsed data |
| avctx->sample_rate = s->sample_rate; |
| avctx->bit_rate = s->bit_rate; |
| |
| s->profile = FF_PROFILE_DTS; |
| |
| for (i = 0; i < (s->sample_blocks / 8); i++) { |
| if ((ret = dca_decode_block(s, 0, i))) { |
| av_log(avctx, AV_LOG_ERROR, "error decoding block\n"); |
| return ret; |
| } |
| } |
| |
| /* record number of core channels incase less than max channels are requested */ |
| num_core_channels = s->prim_channels; |
| |
| if (s->prim_channels + !!s->lfe > 2 && |
| avctx->request_channel_layout == AV_CH_LAYOUT_STEREO) { |
| /* Stereo downmix coefficients |
| * |
| * The decoder can only downmix to 2-channel, so we need to ensure |
| * embedded downmix coefficients are actually targeting 2-channel. |
| */ |
| if (s->core_downmix && (s->core_downmix_amode == DCA_STEREO || |
| s->core_downmix_amode == DCA_STEREO_TOTAL)) { |
| int sign, code; |
| for (i = 0; i < num_core_channels + !!s->lfe; i++) { |
| sign = s->core_downmix_codes[i][0] & 0x100 ? 1 : -1; |
| code = s->core_downmix_codes[i][0] & 0x0FF; |
| s->downmix_coef[i][0] = (!code ? 0.0f : |
| sign * dca_dmixtable[code - 1]); |
| sign = s->core_downmix_codes[i][1] & 0x100 ? 1 : -1; |
| code = s->core_downmix_codes[i][1] & 0x0FF; |
| s->downmix_coef[i][1] = (!code ? 0.0f : |
| sign * dca_dmixtable[code - 1]); |
| } |
| s->output = s->core_downmix_amode; |
| } else { |
| int am = s->amode & DCA_CHANNEL_MASK; |
| if (am >= FF_ARRAY_ELEMS(dca_default_coeffs)) { |
| av_log(s->avctx, AV_LOG_ERROR, |
| "Invalid channel mode %d\n", am); |
| return AVERROR_INVALIDDATA; |
| } |
| if (num_core_channels + !!s->lfe > |
| FF_ARRAY_ELEMS(dca_default_coeffs[0])) { |
| avpriv_request_sample(s->avctx, "Downmixing %d channels", |
| s->prim_channels + !!s->lfe); |
| return AVERROR_PATCHWELCOME; |
| } |
| for (i = 0; i < num_core_channels + !!s->lfe; i++) { |
| s->downmix_coef[i][0] = dca_default_coeffs[am][i][0]; |
| s->downmix_coef[i][1] = dca_default_coeffs[am][i][1]; |
| } |
| } |
| av_dlog(s->avctx, "Stereo downmix coeffs:\n"); |
| for (i = 0; i < num_core_channels + !!s->lfe; i++) { |
| av_dlog(s->avctx, "L, input channel %d = %f\n", i, |
| s->downmix_coef[i][0]); |
| av_dlog(s->avctx, "R, input channel %d = %f\n", i, |
| s->downmix_coef[i][1]); |
| } |
| av_dlog(s->avctx, "\n"); |
| } |
| |
| if (s->ext_coding) |
| s->core_ext_mask = dca_ext_audio_descr_mask[s->ext_descr]; |
| else |
| s->core_ext_mask = 0; |
| |
| core_ss_end = FFMIN(s->frame_size, s->dca_buffer_size) * 8; |
| |
| /* only scan for extensions if ext_descr was unknown or indicated a |
| * supported XCh extension */ |
| if (s->core_ext_mask < 0 || s->core_ext_mask & (DCA_EXT_XCH | DCA_EXT_XXCH)) { |
| |
| /* if ext_descr was unknown, clear s->core_ext_mask so that the |
| * extensions scan can fill it up */ |
| s->core_ext_mask = FFMAX(s->core_ext_mask, 0); |
| |
| /* extensions start at 32-bit boundaries into bitstream */ |
| skip_bits_long(&s->gb, (-get_bits_count(&s->gb)) & 31); |
| |
| while (core_ss_end - get_bits_count(&s->gb) >= 32) { |
| uint32_t bits = get_bits_long(&s->gb, 32); |
| |
| switch (bits) { |
| case 0x5a5a5a5a: { |
| int ext_amode, xch_fsize; |
| |
| s->xch_base_channel = s->prim_channels; |
| |
| /* validate sync word using XCHFSIZE field */ |
| xch_fsize = show_bits(&s->gb, 10); |
| if ((s->frame_size != (get_bits_count(&s->gb) >> 3) - 4 + xch_fsize) && |
| (s->frame_size != (get_bits_count(&s->gb) >> 3) - 4 + xch_fsize + 1)) |
| continue; |
| |
| /* skip length-to-end-of-frame field for the moment */ |
| skip_bits(&s->gb, 10); |
| |
| s->core_ext_mask |= DCA_EXT_XCH; |
| |
| /* extension amode(number of channels in extension) should be 1 */ |
| /* AFAIK XCh is not used for more channels */ |
| if ((ext_amode = get_bits(&s->gb, 4)) != 1) { |
| av_log(avctx, AV_LOG_ERROR, "XCh extension amode %d not" |
| " supported!\n", ext_amode); |
| continue; |
| } |
| |
| if (s->xch_base_channel < 2) { |
| avpriv_request_sample(avctx, "XCh with fewer than 2 base channels"); |
| continue; |
| } |
| |
| /* much like core primary audio coding header */ |
| dca_parse_audio_coding_header(s, s->xch_base_channel, 0); |
| |
| for (i = 0; i < (s->sample_blocks / 8); i++) |
| if ((ret = dca_decode_block(s, s->xch_base_channel, i))) { |
| av_log(avctx, AV_LOG_ERROR, "error decoding XCh extension\n"); |
| continue; |
| } |
| |
| s->xch_present = 1; |
| break; |
| } |
| case 0x47004a03: |
| /* XXCh: extended channels */ |
| /* usually found either in core or HD part in DTS-HD HRA streams, |
| * but not in DTS-ES which contains XCh extensions instead */ |
| s->core_ext_mask |= DCA_EXT_XXCH; |
| dca_xxch_decode_frame(s); |
| break; |
| |
| case 0x1d95f262: { |
| int fsize96 = show_bits(&s->gb, 12) + 1; |
| if (s->frame_size != (get_bits_count(&s->gb) >> 3) - 4 + fsize96) |
| continue; |
| |
| av_log(avctx, AV_LOG_DEBUG, "X96 extension found at %d bits\n", |
| get_bits_count(&s->gb)); |
| skip_bits(&s->gb, 12); |
| av_log(avctx, AV_LOG_DEBUG, "FSIZE96 = %d bytes\n", fsize96); |
| av_log(avctx, AV_LOG_DEBUG, "REVNO = %d\n", get_bits(&s->gb, 4)); |
| |
| s->core_ext_mask |= DCA_EXT_X96; |
| break; |
| } |
| } |
| |
| skip_bits_long(&s->gb, (-get_bits_count(&s->gb)) & 31); |
| } |
| } else { |
| /* no supported extensions, skip the rest of the core substream */ |
| skip_bits_long(&s->gb, core_ss_end - get_bits_count(&s->gb)); |
| } |
| |
| if (s->core_ext_mask & DCA_EXT_X96) |
| s->profile = FF_PROFILE_DTS_96_24; |
| else if (s->core_ext_mask & (DCA_EXT_XCH | DCA_EXT_XXCH)) |
| s->profile = FF_PROFILE_DTS_ES; |
| |
| /* check for ExSS (HD part) */ |
| if (s->dca_buffer_size - s->frame_size > 32 && |
| get_bits_long(&s->gb, 32) == DCA_HD_MARKER) |
| dca_exss_parse_header(s); |
| |
| avctx->profile = s->profile; |
| |
| full_channels = channels = s->prim_channels + !!s->lfe; |
| |
| /* If we have XXCH then the channel layout is managed differently */ |
| /* note that XLL will also have another way to do things */ |
| if (!(s->core_ext_mask & DCA_EXT_XXCH) |
| || (s->core_ext_mask & DCA_EXT_XXCH && avctx->request_channels > 0 |
| && avctx->request_channels |
| < num_core_channels + !!s->lfe + s->xxch_chset_nch[0])) |
| { /* xxx should also do MA extensions */ |
| if (s->amode < 16) { |
| avctx->channel_layout = dca_core_channel_layout[s->amode]; |
| |
| if (s->prim_channels + !!s->lfe > 2 && |
| avctx->request_channel_layout == AV_CH_LAYOUT_STEREO) { |
| /* |
| * Neither the core's auxiliary data nor our default tables contain |
| * downmix coefficients for the additional channel coded in the XCh |
| * extension, so when we're doing a Stereo downmix, don't decode it. |
| */ |
| s->xch_disable = 1; |
| } |
| |
| #if FF_API_REQUEST_CHANNELS |
| FF_DISABLE_DEPRECATION_WARNINGS |
| if (s->xch_present && !s->xch_disable && |
| (!avctx->request_channels || |
| avctx->request_channels > num_core_channels + !!s->lfe)) { |
| FF_ENABLE_DEPRECATION_WARNINGS |
| #else |
| if (s->xch_present && !s->xch_disable) { |
| #endif |
| if (avctx->channel_layout & AV_CH_BACK_CENTER) { |
| avpriv_request_sample(avctx, "XCh with Back center channel"); |
| return AVERROR_INVALIDDATA; |
| } |
| avctx->channel_layout |= AV_CH_BACK_CENTER; |
| if (s->lfe) { |
| avctx->channel_layout |= AV_CH_LOW_FREQUENCY; |
| s->channel_order_tab = dca_channel_reorder_lfe_xch[s->amode]; |
| } else { |
| s->channel_order_tab = dca_channel_reorder_nolfe_xch[s->amode]; |
| } |
| if (s->channel_order_tab[s->xch_base_channel] < 0) |
| return AVERROR_INVALIDDATA; |
| } else { |
| channels = num_core_channels + !!s->lfe; |
| s->xch_present = 0; /* disable further xch processing */ |
| if (s->lfe) { |
| avctx->channel_layout |= AV_CH_LOW_FREQUENCY; |
| s->channel_order_tab = dca_channel_reorder_lfe[s->amode]; |
| } else |
| s->channel_order_tab = dca_channel_reorder_nolfe[s->amode]; |
| } |
| |
| if (channels > !!s->lfe && |
| s->channel_order_tab[channels - 1 - !!s->lfe] < 0) |
| return AVERROR_INVALIDDATA; |
| |
| if (av_get_channel_layout_nb_channels(avctx->channel_layout) != channels) { |
| av_log(avctx, AV_LOG_ERROR, "Number of channels %d mismatches layout %d\n", channels, av_get_channel_layout_nb_channels(avctx->channel_layout)); |
| return AVERROR_INVALIDDATA; |
| } |
| |
| if (num_core_channels + !!s->lfe > 2 && |
| avctx->request_channel_layout == AV_CH_LAYOUT_STEREO) { |
| channels = 2; |
| s->output = s->prim_channels == 2 ? s->amode : DCA_STEREO; |
| avctx->channel_layout = AV_CH_LAYOUT_STEREO; |
| } |
| else if (avctx->request_channel_layout & AV_CH_LAYOUT_NATIVE) { |
| static const int8_t dca_channel_order_native[9] = { 0, 1, 2, 3, 4, 5, 6, 7, 8 }; |
| s->channel_order_tab = dca_channel_order_native; |
| } |
| s->lfe_index = dca_lfe_index[s->amode]; |
| } else { |
| av_log(avctx, AV_LOG_ERROR, |
| "Non standard configuration %d !\n", s->amode); |
| return AVERROR_INVALIDDATA; |
| } |
| |
| s->xxch_dmix_embedded = 0; |
| } else { |
| /* we only get here if an XXCH channel set can be added to the mix */ |
| channel_mask = s->xxch_core_spkmask; |
| |
| if (avctx->request_channels > 0 |
| && avctx->request_channels < s->prim_channels) { |
| channels = num_core_channels + !!s->lfe; |
| for (i = 0; i < s->xxch_chset && channels + s->xxch_chset_nch[i] |
| <= avctx->request_channels; i++) { |
| channels += s->xxch_chset_nch[i]; |
| channel_mask |= s->xxch_spk_masks[i]; |
| } |
| } else { |
| channels = s->prim_channels + !!s->lfe; |
| for (i = 0; i < s->xxch_chset; i++) { |
| channel_mask |= s->xxch_spk_masks[i]; |
| } |
| } |
| |
| /* Given the DTS spec'ed channel mask, generate an avcodec version */ |
| channel_layout = 0; |
| for (i = 0; i < s->xxch_nbits_spk_mask; ++i) { |
| if (channel_mask & (1 << i)) { |
| channel_layout |= map_xxch_to_native[i]; |
| } |
| } |
| |
| /* make sure that we have managed to get equivelant dts/avcodec channel |
| * masks in some sense -- unfortunately some channels could overlap */ |
| if (av_popcount(channel_mask) != av_popcount(channel_layout)) { |
| av_log(avctx, AV_LOG_DEBUG, |
| "DTS-XXCH: Inconsistent avcodec/dts channel layouts\n"); |
| return AVERROR_INVALIDDATA; |
| } |
| |
| avctx->channel_layout = channel_layout; |
| |
| if (!(avctx->request_channel_layout & AV_CH_LAYOUT_NATIVE)) { |
| /* Estimate DTS --> avcodec ordering table */ |
| for (chset = -1, j = 0; chset < s->xxch_chset; ++chset) { |
| mask = chset >= 0 ? s->xxch_spk_masks[chset] |
| : s->xxch_core_spkmask; |
| for (i = 0; i < s->xxch_nbits_spk_mask; i++) { |
| if (mask & ~(DCA_XXCH_LFE1 | DCA_XXCH_LFE2) & (1 << i)) { |
| lavc = map_xxch_to_native[i]; |
| posn = av_popcount(channel_layout & (lavc - 1)); |
| s->xxch_order_tab[j++] = posn; |
| } |
| } |
| |
| } |
| |
| s->lfe_index = av_popcount(channel_layout & (AV_CH_LOW_FREQUENCY-1)); |
| } else { /* native ordering */ |
| for (i = 0; i < channels; i++) |
| s->xxch_order_tab[i] = i; |
| |
| s->lfe_index = channels - 1; |
| } |
| |
| s->channel_order_tab = s->xxch_order_tab; |
| } |
| |
| if (avctx->channels != channels) { |
| if (avctx->channels) |
| av_log(avctx, AV_LOG_INFO, "Number of channels changed in DCA decoder (%d -> %d)\n", avctx->channels, channels); |
| avctx->channels = channels; |
| } |
| |
| /* get output buffer */ |
| frame->nb_samples = 256 * (s->sample_blocks / 8); |
| if ((ret = ff_get_buffer(avctx, frame, 0)) < 0) |
| return ret; |
| samples_flt = (float **)frame->extended_data; |
| |
| /* allocate buffer for extra channels if downmixing */ |
| if (avctx->channels < full_channels) { |
| ret = av_samples_get_buffer_size(NULL, full_channels - channels, |
| frame->nb_samples, |
| avctx->sample_fmt, 0); |
| if (ret < 0) |
| return ret; |
| |
| av_fast_malloc(&s->extra_channels_buffer, |
| &s->extra_channels_buffer_size, ret); |
| if (!s->extra_channels_buffer) |
| return AVERROR(ENOMEM); |
| |
| ret = av_samples_fill_arrays((uint8_t **)s->extra_channels, NULL, |
| s->extra_channels_buffer, |
| full_channels - channels, |
| frame->nb_samples, avctx->sample_fmt, 0); |
| if (ret < 0) |
| return ret; |
| } |
| |
| /* filter to get final output */ |
| for (i = 0; i < (s->sample_blocks / 8); i++) { |
| int ch; |
| |
| for (ch = 0; ch < channels; ch++) |
| s->samples_chanptr[ch] = samples_flt[ch] + i * 256; |
| for (; ch < full_channels; ch++) |
| s->samples_chanptr[ch] = s->extra_channels[ch - channels] + i * 256; |
| |
| dca_filter_channels(s, i); |
| |
| /* If this was marked as a DTS-ES stream we need to subtract back- */ |
| /* channel from SL & SR to remove matrixed back-channel signal */ |
| if ((s->source_pcm_res & 1) && s->xch_present) { |
| float *back_chan = s->samples_chanptr[s->channel_order_tab[s->xch_base_channel]]; |
| float *lt_chan = s->samples_chanptr[s->channel_order_tab[s->xch_base_channel - 2]]; |
| float *rt_chan = s->samples_chanptr[s->channel_order_tab[s->xch_base_channel - 1]]; |
| s->fdsp.vector_fmac_scalar(lt_chan, back_chan, -M_SQRT1_2, 256); |
| s->fdsp.vector_fmac_scalar(rt_chan, back_chan, -M_SQRT1_2, 256); |
| } |
| |
| /* If stream contains XXCH, we might need to undo an embedded downmix */ |
| if (s->xxch_dmix_embedded) { |
| /* Loop over channel sets in turn */ |
| ch = num_core_channels; |
| for (chset = 0; chset < s->xxch_chset; chset++) { |
| endch = ch + s->xxch_chset_nch[chset]; |
| mask = s->xxch_dmix_embedded; |
| |
| /* undo downmix */ |
| for (j = ch; j < endch; j++) { |
| if (mask & (1 << j)) { /* this channel has been mixed-out */ |
| src_chan = s->samples_chanptr[s->channel_order_tab[j]]; |
| for (k = 0; k < endch; k++) { |
| achan = s->channel_order_tab[k]; |
| scale = s->xxch_dmix_coeff[j][k]; |
| if (scale != 0.0) { |
| dst_chan = s->samples_chanptr[achan]; |
| s->fdsp.vector_fmac_scalar(dst_chan, src_chan, |
| -scale, 256); |
| } |
| } |
| } |
| } |
| |
| /* if a downmix has been embedded then undo the pre-scaling */ |
| if ((mask & (1 << ch)) && s->xxch_dmix_sf[chset] != 1.0f) { |
| scale = s->xxch_dmix_sf[chset]; |
| |
| for (j = 0; j < ch; j++) { |
| src_chan = s->samples_chanptr[s->channel_order_tab[j]]; |
| for (k = 0; k < 256; k++) |
| src_chan[k] *= scale; |
| } |
| |
| /* LFE channel is always part of core, scale if it exists */ |
| if (s->lfe) { |
| src_chan = s->samples_chanptr[s->lfe_index]; |
| for (k = 0; k < 256; k++) |
| src_chan[k] *= scale; |
| } |
| } |
| |
| ch = endch; |
| } |
| |
| } |
| } |
| |
| /* update lfe history */ |
| lfe_samples = 2 * s->lfe * (s->sample_blocks / 8); |
| for (i = 0; i < 2 * s->lfe * 4; i++) |
| s->lfe_data[i] = s->lfe_data[i + lfe_samples]; |
| |
| /* AVMatrixEncoding |
| * |
| * DCA_STEREO_TOTAL (Lt/Rt) is equivalent to Dolby Surround */ |
| ret = ff_side_data_update_matrix_encoding(frame, |
| (s->output & ~DCA_LFE) == DCA_STEREO_TOTAL ? |
| AV_MATRIX_ENCODING_DOLBY : AV_MATRIX_ENCODING_NONE); |
| if (ret < 0) |
| return ret; |
| |
| *got_frame_ptr = 1; |
| |
| return buf_size; |
| } |
| |
| |
| |
| /** |
| * DCA initialization |
| * |
| * @param avctx pointer to the AVCodecContext |
| */ |
| |
| static av_cold int dca_decode_init(AVCodecContext *avctx) |
| { |
| DCAContext *s = avctx->priv_data; |
| |
| s->avctx = avctx; |
| dca_init_vlcs(); |
| |
| avpriv_float_dsp_init(&s->fdsp, avctx->flags & CODEC_FLAG_BITEXACT); |
| ff_mdct_init(&s->imdct, 6, 1, 1.0); |
| ff_synth_filter_init(&s->synth); |
| ff_dcadsp_init(&s->dcadsp); |
| ff_fmt_convert_init(&s->fmt_conv, avctx); |
| |
| avctx->sample_fmt = AV_SAMPLE_FMT_FLTP; |
| |
| /* allow downmixing to stereo */ |
| #if FF_API_REQUEST_CHANNELS |
| FF_DISABLE_DEPRECATION_WARNINGS |
| if (avctx->request_channels == 2) |
| avctx->request_channel_layout = AV_CH_LAYOUT_STEREO; |
| FF_ENABLE_DEPRECATION_WARNINGS |
| #endif |
| if (avctx->channels > 2 && |
| avctx->request_channel_layout == AV_CH_LAYOUT_STEREO) |
| avctx->channels = 2; |
| |
| return 0; |
| } |
| |
| static av_cold int dca_decode_end(AVCodecContext *avctx) |
| { |
| DCAContext *s = avctx->priv_data; |
| ff_mdct_end(&s->imdct); |
| av_freep(&s->extra_channels_buffer); |
| return 0; |
| } |
| |
| static const AVProfile profiles[] = { |
| { FF_PROFILE_DTS, "DTS" }, |
| { FF_PROFILE_DTS_ES, "DTS-ES" }, |
| { FF_PROFILE_DTS_96_24, "DTS 96/24" }, |
| { FF_PROFILE_DTS_HD_HRA, "DTS-HD HRA" }, |
| { FF_PROFILE_DTS_HD_MA, "DTS-HD MA" }, |
| { FF_PROFILE_UNKNOWN }, |
| }; |
| |
| static const AVOption options[] = { |
| { "disable_xch", "disable decoding of the XCh extension", offsetof(DCAContext, xch_disable), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, AV_OPT_FLAG_DECODING_PARAM|AV_OPT_FLAG_AUDIO_PARAM }, |
| { NULL }, |
| }; |
| |
| static const AVClass dca_decoder_class = { |
| .class_name = "DCA decoder", |
| .item_name = av_default_item_name, |
| .option = options, |
| .version = LIBAVUTIL_VERSION_INT, |
| .category = AV_CLASS_CATEGORY_DECODER, |
| }; |
| |
| AVCodec ff_dca_decoder = { |
| .name = "dca", |
| .long_name = NULL_IF_CONFIG_SMALL("DCA (DTS Coherent Acoustics)"), |
| .type = AVMEDIA_TYPE_AUDIO, |
| .id = AV_CODEC_ID_DTS, |
| .priv_data_size = sizeof(DCAContext), |
| .init = dca_decode_init, |
| .decode = dca_decode_frame, |
| .close = dca_decode_end, |
| .capabilities = CODEC_CAP_CHANNEL_CONF | CODEC_CAP_DR1, |
| .sample_fmts = (const enum AVSampleFormat[]) { AV_SAMPLE_FMT_FLTP, |
| AV_SAMPLE_FMT_NONE }, |
| .profiles = NULL_IF_CONFIG_SMALL(profiles), |
| .priv_class = &dca_decoder_class, |
| }; |